Chang Chen (nickname Si'r), a junior high student in 1959
Taipei, is forced to attend night school after failing a test. This upsets his father, a career government worker, who is aware of and worried about the delinquency rampant among night school students. The next morning, Si'r and his father listen to a radio broadcast featuring distinguished students. In 1960, Si'r, along with his best friend Cat, spy on an actress changing clothes during the filming of a drama in a movie studio. After being caught by a guard, they steal his flashlight and flee back to school. Si'r, noticing movement in a darkened classroom, turns on the flashlight and startles a pair of lovers, though he does not see their faces. Two gangs, the Little Park Boys and their rivals, the 217s, are introduced. Si'r is not a member of either gang, but he is closer to the Little Park Boys. The Little Park Boys are led by Honey, who is hiding in
Tainan from the police after killing one of the 217s over his girlfriend Ming. Sly leads the gang in his absence. Sly and Si'r become rivals after Si'r gets Sly in trouble, believing that Sly and his girlfriend, Jade, are the pair of lovers he saw. Meanwhile, Si'r and Ming meet by chance and become friends. Ma, a transfer student with a violent reputation, joins the night school class and defends Si'r when a group of 217s come to harass him. The 217s saw Si'r with Ming, and also confuse him for another student, Tiger, who played basketball with her. Ma's family lives in a house abandoned by a Japanese military family after the war, and he has found a number of swords and knives in the attic, which he brags about to his new classmates. Ma and Si'r become friends. Ma teaches him to shoot and tries to dissuade him from taking romantic relationships seriously. Sly proposes a truce, arranging a concert with members from both gangs. Honey unexpectedly resurfaces and berates Sly for setting up the concert. However, he realizes the gang respects Sly more than him. The night before the concert, Honey gives his blessing to Si'r's relationship with Ming, believing him to be a stable boyfriend. Si'r also befriends Horsecart, a member of a third gang Ma is associated with. The next night, Honey appears outside the concert hall, antagonizing the 217s. He takes an ostensibly friendly walk with the 217's leader, Shandong, only to be killed when Shandong pushes him in front of an oncoming car. Si'r and Deuce, Honey's younger brother, meet with the gang Horsecart is a member of, and they prepare for revenge. Si'r and Deuce watch as they murder the 217s with Japanese weapons during a typhoon. Sly goes into hiding. Si'r tries to get answers from a mortally wounded Shandong, but he dies while Crazy grieves for him. The same night, Si'r's father is arrested by the secret police and interrogated about his past connections with the Chinese Communist Party and Professor Hsia. While eventually freed, he is demoted. Si'r starts dating Ming and seems to be improving academically. However, she reveals that many other men are flirtatious with her, including an older doctor, which bothers Si'r. The next day, Si'r is expelled after lashing out at the doctor and smashing a light bulb. He promises to pass his transfer exams to get into day school, upsetting Ming, who knows this means she will see him less. Later, Sly emerges from hiding and apologizes to Si'r for their past feud, revealing that Ming and Ma are dating. Devastated, Si'r begins dating Jade, but he upsets her, and she bitterly reveals that the girl he saw kissing Sly was Ming, not her. After threatening Ma at his home, Si'r steals a knife from Ma's stash that Cat had hidden in his bookshelf and waits outside the school for him. Instead, he sees Ming and berates her for her promiscuity, claiming that he is her only hope. Ming chides Si'r for being selfish and trying to change her; like the world, she cannot be changed. He stabs her to death and breaks down. Si'r is sentenced to death, but the media frenzy surrounding the case prompts the sentence to be changed to 15 years of imprisonment. In Si'r's now-barren house, his mother unexpectedly finds Si'r's school uniform. As she sobs, the radio broadcasts a list of distinguished students. ==Cast==