Jim (Leonardo DiCaprio Leonardo DiCaprio) is a high school student in a Catholic school, and he is also one of the best high school teams in New York. He and the other three players on the team hang around all day, truant, taking drugs, stealing, fighting, and their youth is wasted on the streets of New York. Jim recorded his life in the "Basketball Diary". Later, Jim's best friend Bobby died of leukemia, which was a great blow to Jim. Because of a "surprise" from Newjoon, Jim began to contact psychedelic drugs, and soon he was addicted to drugs. The lack of communication with his mother, the simple and rough education of the godfather of the school, and the sexual harassment of the team coach all made Jim sink deeper and deeper in self-abandonment. Every time a drug addiction attacks, they will try their best to get the money to buy drugs, and Jim falls into the abyss of depravity... This film is adapted from the autobiographical novel of writer and musician Jim Carlo.