Cheng Chao-an (Bruce Lee), a Chinese young man works in an ice factory in Bangkok. The factory owner, Hsa Mi, is known as a prominent figure in overseas Chinese society. But, in secret, he is an underground boss operating a huge chain of vice dens.

One day several workers run into their boss’s secret deeds and are never seen again. Cheng sets out to investigate. Hsa’s evil deeds eventually come to light. Cheng finds drug parcels and even dead bodies of the missing workers stuffed inside the ice blocks. In a fit of anger, Cheng cracks down on the set-up, killing many racketeers. But his girlfriend is later found to have been abducted. And a deadly clash ensues of Hsa’s quiet villa