Love in Disguise Episode 3, titled “There’s Poison in the Milk,” takes the mystery surrounding Yoon Yi-jun’s former secretary to a new level. Kang Jae-hee continues her undercover investigation, but the strange events inside Yi-jun’s house suggest that someone may be trying to harm him. As she discovers new clues, their relationship also becomes more complicated.
The third episode mixes romantic comedy, suspense, and a murder investigation. It gives viewers a better look at Yi-jun’s troubled past while raising fresh questions about the people around him. The ending leaves Jae-hee in danger and makes the next episode even more important.
Love in Disguise: Series Background
Love in Disguise is a South Korean romantic comedy and mystery drama released in October 2026. The story follows Kang Jae-hee, a former special forces soldier who becomes a detective, and Yoon Yi-jun, an heir to the powerful Taekang Group who is suspected of murdering his secretary.
To investigate the case, Jae-hee disguises herself as a man and takes a job as Yi-jun’s personal aide. While she tries to uncover the truth, Yi-jun remains unaware of her real identity. Their constant arguments, hidden secrets, and growing attraction form the heart of the series.
The title Love in Disguise refers to the hidden identities and secret feelings that shape the story. Jae-hee is hiding who she really is, while Yi-jun keeps his emotions and personal troubles behind a cold exterior. The drama uses these secrets to create both comedy and suspense.
Love in Disguise Episode 3 Recap
Yi-jun and Jae-hee Continue to Clash
The episode opens with an awkward moment between Yi-jun and Jae-hee. After the events of the previous episode, their relationship remains tense, and Yi-jun quickly returns to his usual argumentative behaviour. Even when he shows concern for Jae-hee, he struggles to express it openly.
During their journey together, Yi-jun reveals that he already knows who sent a reporter to the gallery. The incident points toward a larger conflict within his family and business circle. His older sister, Yoon Na-jung, is also involved in the attempt to gather information about him.
Although Yi-jun often treats Jae-hee harshly, small gestures suggest that he is beginning to care about her. He adjusts her tie and checks her neck after an earlier confrontation. These moments add a softer side to his character without removing the tension between them.
Yi-jun Visits His Late Secretary’s Resting Place
One of the episode’s important scenes takes place when Yi-jun visits the resting place of Secretary Han, the woman whose death made him the main suspect in a murder investigation.
Jae-hee follows him and asks questions about what happened. Yi-jun admits that he feels responsible for Han’s death and wanted to apologise to her. His statement makes the situation more complicated because feeling guilty does not necessarily mean that he committed the crime.
Jae-hee records their conversation and shares it with her colleagues. However, they realise that the recording cannot be used as evidence in court because it was obtained illegally. The investigation must therefore continue through other leads, including the search for Park Min-hwan.
This scene gives viewers a glimpse of Yi-jun’s guilt and emotional pain. He may be hiding something, but the episode does not provide enough proof to establish that he killed his former secretary.
The Strange Milk Raises New Questions
Later that night, Yi-jun wakes from a nightmare and becomes concerned about a bottle of milk. He believes that the quantity has changed, even though nobody should have touched it. He calls Jae-hee and asks her to investigate the strange situation.
At first, Jae-hee thinks he is being unreasonable. However, she later gives some of the milk to Jerry, the household cat. The next morning, she notices that the metal bowl has turned black. This unusual reaction makes her suspect that something dangerous may be happening inside the house.
The milk becomes one of the episode’s most important clues. If someone has tampered with it, Yi-jun could be in danger even while surrounded by his own staff. Jae-hee begins watching the people around the house more carefully.
Jae-hee Learns About Yi-jun’s Difficult Childhood
Jae-hee also tries to understand Yi-jun by speaking with his former secretary, Jung. She learns that Yi-jun grew up under the strict control of his father, Chairman Yoon.
A flashback shows how demanding his upbringing was. Even receiving an A instead of an A+ was enough to earn punishment. Yi-jun was expected to be perfect and often had to take the blame when something went wrong.
This background helps explain why Yi-jun is so guarded and quick to become angry. He has spent much of his life under pressure, with little room to make mistakes. His behaviour may be difficult to accept, but the episode shows that it comes from years of harsh treatment.
Jung also dismisses rumours that Yi-jun was romantically involved with Secretary Han. According to him, Han was dating someone else at the office. His statement weakens one possible explanation for the murder, although it does not prove Yi-jun’s innocence.
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Jae-hee Finds a Hidden Room
As the investigation continues, Jae-hee becomes increasingly suspicious of the house. She also notices that someone has been watching the property from outside. When she catches the person, she discovers that it is Secretary Jung, who wants to return to his former job.
After gathering more information, Jae-hee takes advantage of an opportunity to enter Yi-jun’s secret room. The room contains artwork and other valuable objects, but her attention turns to a hidden door behind a painting.
Behind the wall, she discovers a phone that she believes belonged to Secretary Han. The missing phone could be an important piece of evidence because it may contain information connected to Han’s death.
However, Jae-hee has little time to investigate the discovery. Yi-jun realises that something is wrong and returns to the house. He catches her inside the restricted room, leaving her with few ways to explain her actions.
Yi-jun Fires Jae-hee
Yi-jun becomes furious when he finds Jae-hee in the secret room. He tells her to leave, believing that she has crossed a line by entering a place he specifically wanted kept private.
Jae-hee explains that she is trying to discover whether he killed Secretary Han. She also points to the strange milk and the suspicious events around the house as reasons for her investigation.
The confrontation puts her undercover mission at risk. She needs to remain close to Yi-jun to uncover the truth, but her investigation is making him increasingly suspicious of her. If he discovers her real identity, she could lose her access to the evidence she needs.
The Chandelier Accident Changes Everything
Just as their argument reaches its peak, Jae-hee notices that the chandelier above them is about to fall. She reacts quickly and pushes Yi-jun out of danger, putting herself at risk in the process.
The moment is important because Jae-hee’s actions show that her concern for Yi-jun is not limited to her investigation. She is prepared to protect him even though he has just fired her and continues to treat her with suspicion.
The episode ends with the chandelier falling on Jae-hee, leaving her fate uncertain. The sudden accident also raises another question: was it simply an accident, or is someone deliberately trying to hurt Yi-jun by targeting the people around him?
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Love in Disguise Episode 3 Ending Explained
The ending brings together the episode’s main themes of trust, danger, and hidden motives. Jae-hee discovers a possible clue to Secretary Han’s death, but her investigation comes at a personal cost when Yi-jun catches her inside the secret room.
The falling chandelier adds a new layer to the mystery. Since the episode has already shown suspicious activity around Yi-jun’s home and possible tampering with the milk, the accident makes it reasonable to question whether someone is attempting to harm him.
Jae-hee’s decision to push Yi-jun out of danger also changes their relationship. Until now, much of their connection has involved arguments and suspicion. By protecting him at the risk of her own safety, she shows that her feelings and sense of duty may be becoming more complicated.
However, the episode does not confirm who is behind the suspicious incidents. The missing phone, Park Min-hwan’s disappearance, and the person watching the house remain unresolved parts of the case. These clues suggest that the truth about Secretary Han’s death may involve more people than Yi-jun alone.
What Does Episode 3 Reveal About Yi-jun and Jae-hee?
Yi-jun is more than a cold and demanding heir. His childhood explains some of his behaviour, and his visit to Secretary Han’s resting place shows that he carries a heavy sense of guilt. His actions toward Jae-hee also suggest that he is starting to care about her, even if he does not know how to show it properly.
Jae-hee, meanwhile, remains focused on her mission. She is observant, brave, and willing to take risks to find the truth. Yet her growing concern for Yi-jun could make the investigation harder. She must decide how far she can trust him without forgetting why she went undercover in the first place.
Their relationship works because neither character fully understands the other. Yi-jun does not know Jae-hee’s true identity, and Jae-hee does not know the whole truth about his past. As they spend more time together, their personal connection may become just as important as the murder case.
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Love in Disguise Episode 3 Review
Episode 3 is an entertaining chapter that balances humour with a growing sense of danger. The awkward moments between Yi-jun and Jae-hee keep the romantic comedy alive, while the mysterious milk and hidden phone give the investigation a stronger direction.
The episode’s best scenes are those that reveal Yi-jun’s vulnerable side without answering every question about him. His difficult childhood and guilt over Secretary Han’s death make him a more interesting character than a typical rich heir who simply behaves badly.
Jae-hee is also becoming more than an undercover detective. Her quick thinking helps her find clues, and her decision to save Yi-jun gives their relationship a meaningful turning point. At the same time, the story introduces several unanswered questions, especially about the missing phone and the danger inside Yi-jun’s home.
Some of the repeated arguments between the leads can feel familiar, but the mystery gives their interactions a purpose. The final accident is an effective cliffhanger because it puts Jae-hee in danger just when she appears to be getting closer to the truth.
Overall, Episode 3 moves the murder investigation forward while building the emotional connection between its main characters. It leaves viewers with enough clues to form theories, but not enough answers to solve the case yet.
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| Detail | Information |
|---|---|
| Series | Love in Disguise |
| Episode | Season 1, Episode 3 |
| Episode title | There’s Poison in the Milk |
| Release date | October 26, 2026 |
| Country of origin | South Korea |
| Genre | Romantic comedy, mystery, thriller |
| Main characters | Kang Jae-hee and Yoon Yi-jun |
| Lead actors | Seol In-ah and Yim Si-wan |
| Main mystery | Secretary Han’s death and the suspicious events at Yi-jun’s home |
| Important discovery | A hidden phone believed to belong to Secretary Han |
| Major twist | Jae-hee discovers evidence of possible danger inside the house |
| Ending | Jae-hee saves Yi-jun from a falling chandelier but is struck by it herself |
| Overall verdict | A suspenseful episode that develops the characters and deepens the mystery |
Yes. Jae-hee discovers a hidden phone inside a secret room in Yi-jun’s house. She believes it belonged to Secretary Han, whose death is at the centre of the investigation.
Yi-jun visits Secretary Han’s resting place and admits that he feels responsible for her death. However, the episode does not confirm that he murdered her. His guilt could be connected to events that have not yet been fully revealed.
The episode shows that Yi-jun grew up under strict control from his father, Chairman Yoon. He was expected to be perfect and faced punishment for even small mistakes. This helps explain why he often appears cold, defensive, and difficult to approach.
Yi-jun fires Jae-hee after catching her inside his secret room. He feels that she has invaded his privacy, while Jae-hee is trying to find evidence connected to Secretary Han’s death.