When Dr. Yuen attempts to rescue a girl about to be sacrificed by the Worm Tribe in the middle of a jungle in Thailand, he is damned with seven deadly "blood curses" and must return there to find a permanent cure.

Two rival swordsmen in imperial China, poncho-clad Fu Hung-Hsueh and Yen nan-Fei vie with a power-hungry villain for the deadly Peacock Dart and fend off waves of expert killers during their journey.