Xi Jiajing (Kitano Takeshi) is a policeman. His daughter died a few years ago, and now his wife (Kayoko Kishimoto) has terminal leukemia. He kindly asked him to visit his wife's partner Horita (Ren Osugi), but was seriously injured in the task, resulting in paralysis of the lower body and being accompanied by a wheelchair. Later, Nishi mistakenly arrested a person, which led to the death of his younger generation Tanaka (Makoto Ashikawa). He resigned, trying to support Tanaka's widowed wife (everyone is played by Duan Liyang), approaching and comforting his old friends, and the underworld chasing him for profit, all of which made Lucy at a loss. He decided to take risks, do something risky and finish everything. Finally, Lucy went on a trip with her wife and didn't go home.