Enter the Dragon revolves around the three main characters. Lee, a man recruited by an agency to investigate a tournament hosted by Han, since they believe he has an Opium trade there. Roper and Williams are former army buddies since Vietnam and they enter the tournament due to different problems that they have. Roper is on the run from the Mafia due to his gambling debts, while Williams is harassed by racist police officers and defends himself from them and uses the car for his getaway. It is a deadly tournament that they will enter on an island. Lee's job is to get the other two out of there alive.
Enter the Dragon was the first Chinese martial arts film to have been produced by a major Hollywood studio – Warner Bros. and was produced in association with Golden Harvest and Lee's Concord Production Company. The film is largely set in Hong Kong.

Among the stuntmen for the film were members of the Seven Little Fortunes, including Jackie Chan and Sammo Hung. This was arguably instrumental in Chan and Hung's further association with Golden Harvest studios, which later launched their careers. The portly Hung is shown fighting Lee in the opening sequence of the movie and Chan shows up as a henchman when Lee is discovered inside Han's underground lair.