Jin (
Huang Bo), a Chinese fishing trawler captain, travels to Kyoto after learning that his daughter, Nana (Zhou Yiran), a student at
Kyoto University, has gone missing. Following the discovery of Nana's body, the autopsy reveals that she was gang-raped and stabbed non-fatally, leading to her death from blood loss. Jin confronts Miaomiao (Zhang Youhao), Nana's boyfriend, but Miaomiao evades him and flees to China. In China, Jin attempts to locate Miaomiao, who is being hidden by his mother, Jing Lan (
Zhou Xun). Jing, who is trying to secure a German visa for Miaomiao, misleads Jin while hiding her son in a safe house. However, Miaomiao escapes to a
cosplay convention, leading to a pursuit by Jin. The chase ends with both men falling onto an inflatable figurine, after which Miaomiao hides at his father's mansion. Jing locks Jin in the mansion's basement, but as police arrive, Jin escapes by setting a fire and is saved from smoke inhalation by Jing. A car chase ensues during a storm as Jing drives to the airport to meet Miaomiao. A collision occurs, leaving everyone but Jin incapacitated. Jin kidnaps Miaomiao and refuses to reveal his location, bargaining for three days' freedom to attend Nana's funeral in Kyoto. There, Jin tracks down and kills or injures the three students involved in Nana's assault. Upon his return, Jin reveals evidence of Miaomiao's betrayal of Nana and claims to have killed him. Jing attempts suicide but is saved by Jin, leading her to refuse to testify against him, forcing the police to drop the charges. It is later revealed that Miaomiao's father harbors resentment towards him due to an accident that injured his younger sister, exacerbated by a recent prank that caused further harm. The Japanese police conclude that Nana's wounds were self-inflicted and that her death was a result of her emotional distress, exacerbated by Miaomiao's rejection. In the final scene, Jin releases a still-alive Miaomiao, whom he had kept chained in a lighthouse. Jin is later convicted for kidnapping and breaking into the mansion, Miaomiao for injuring his sister, and Officer Dai for mishandling the case. After serving his sentence, Jin donates the proceeds from selling his trawler to a charity for adolescent mental health. ==Cast==