Who'd want to be Fatty ? This easygoing low-level hustler suddenly finds himself being chased by several bunches of people. He's the last person in the country with a rare blood type, which is needed to save the lives of two people critically injured.
The injured are
1) The "Daka" Lama, on a peace visit, and on the Japanese Red Army's hit list
2) The girlfriend of a weak-stomached Triad.
The JRA are trying to kill all the possible blood donors so that Daka will die. The Triad wants to get to Fatty first, so that his fiancee will get first go at the blood, and the two cops want to get the blood first to Daka.