A husband returns to his apartment after work and is greeted by his wife, who surprises him with the news that she is pregnant. As they start to celebrate, a man claiming to be a cop knocks at the door and proceeds to arrest them both. He accuses the wife of murdering her father and stealing an expensive pocket watch eight years ago. The cop then strangles the husband to death, only for him to suddenly find himself back to the start of the evening after, trapped in a time loop. If the husband dies, leaves the apartment, or time runs out, he returns to the beginning of the evening. After finding the hidden watch in the apartment and proving he is reliving the same evening to his wife, she eventually confesses her secret past. The wife tells him that shortly after she was born, her father had an affair with the nanny, resulting in a child being born. The discovery of the affair and the existence of an illegitimate child drove her mother into a deep depression and eventually death. Years later, during a heated argument on Christmas Eve, she accidentally shot her father with a gun and ran away, afraid of the consequences. The husband eventually questions the cop and learns he was a close friend of his wife's father. The cop's daughter has cancer, and he wants to sell the pocket watch to pay for her treatment. The cop's version of how the father died is also different: The father survived being shot on Christmas Eve, but someone else returned on New Year and killed him with the same gun. Realizing his wife did not commit murder, the husband finds a way to prove his wife's innocence to the cop. The three characters talk peacefully and deduce the killer was the wife's brother from the affair. Unfortunately, the loop still repeats, so the husband focuses on finding the brother's identity. By interrogating the cop with this new information, he learns that his mother, whom he had never met, was the nanny. In shock, his repressed memories return, and he relives that fateful New Year's evening eight years ago: He confronts the man who took care of him and confesses he has fallen in love with his daughter, only to learn that this man is his father, and the daughter is his half-sister. Unable to cope with the