Cheng (Bruce Lee), a young city brawler from Guangdong, China, goes to live with his uncle in Thailand after promising his mother to leave his fighting days behind him. He joins his cousins to work...

Cheng (Bruce Lee), a young city brawler from Guangdong, China, goes to live with his uncle in Thailand after promising his mother to leave his fighting days behind him. He joins his cousins to work at a local ice factory that unbeknownst to them is a front for an illegal drug smuggling operation. His coworkers mysteriously disappear soon after they uncover a suspicious package inside one of the ice block. Cheng’s cousins are murdered soon after when they suspect their boss of foul play. On discovering Cheng's fighting prowess, the big boss of the syndicate attempts to lure him over to their side by promoting him and tempting him with alcohol and prostitutes. But Cheng eventually uncovers the truth and a violent showdown ensues.