Stoner, an Australian cop, has been investigating the spread of a mysterious addictive drug that acts like an aphrodisiac and a hallucenogen on anyone who takes it. When his own sister falls under its influence, he travels to Hong Kong to hunt down the man behind the drug trade, the evil billionaire Mr. Chin. At the same time, a Taiwanese officer has also been sent to stop Chin's drug empire. Together, She and Stoner battle the drug kingpin's dealers and henchmen.