Tong Loong, Bruce Lee, visits relatives in Rome to help fight of a gang of mobsters, who wants to take over his relatives restaurant.
After several attempts to take control of the restaurant and Tong Loong, the mob gang decides to hire a professional killer. An American martial artist, played by Chuck Norris, arrives to the scene... 

This is Bruce Lee's directorial debut, he also choreographed the action scenes, co produced and scripted the film. It contains many great Kung Fu fight scenes. One in particular, cut out from the Western release, were Lee shows of his skills with a pair of nanchukus. Another great scene is of course the last confrontation between Lee and Norris, placed at the Colosseum. 

Called The Return Of The Dragon in the U.S. Although made before 
Enter The Dragon it was not released in America until after Enter's success, thus the U.S. title.