Technically, "A Brighter Summe Day" is based on the story of a real teenager who was responsible for a crime in Taiwain as its focus point but the film is meant to be less of one person's narrative and more of an exploration about a society and its sociopolitical problems at the time that leads to the characters react in certain ways to the environment around them. Young gangs are created as a sense of security from a flawed educational system that leaves them unsure of their future, a husband and father is suspected by the government of working for the Communist Party Of China, a wife lives an unsatisfied life, etc. It is also one of the most epic stories I've ever seen and one of my favorite movies of all time.