When a Chinese rebel murders Chon's estranged father and escapes to England, Chon and Roy make their way to London with revenge on their minds. Chon's sister, Lin, has the same idea, and uncovers a worldwide conspiracy to murder the royal family but almost no one will believe her.

Tang Lung arrives in Rome to help his cousins in the restaurant business. They are being pressured to sell their property to the syndicate, who will stop at nothing to get what they want. When Tang arrives he poses a new threat to the syndicate, and they are unable to defeat him. The syndicate boss hires the best Japanese and European martial artists to fight Tang, but he easily finishes them off. The American martial artist Colt is hired and has a showdown with Tang in Rome's famous Colosseum.