Lin Xu, who is gloomy and has low self-esteem, has a secret affection for her classmate Bai Lu. Because of her worry about gain and loss and her delusion that Bai Lu will be taken away, she kills Bai Lu's friend. As the case is further investigated and Bai Lu and the police officer get closer, she places the source of Bai Lu's tracking on the police officer and sets up a trap to kill the police officer. When she wanted to take Bai Lu away, she was forced and obstructed by her family and Bai Lu's confusion. All kinds of emotions prompted her to kill her relatives in front of Bai Lu, and took Bai Lu to escape. When she was dying, she expressed her gratitude for the redemption to Bai Lu. Bai Lu burst into tears, sinking deeper and deeper into the swamp of twisted love, and committed suicide next to Lin Xu.