Hong Kong detective Bennie Chan has been tracking notorious crime boss Matador – whom he believes to be businessman Victor Wong – for over a decade after he kills Bennie's partner Yung. When Yung's daughter Samantha gets into trouble with Wong's crime syndicate, Bennie must track down an American conman, Connor Watts, who gambles his way through Chinese casinos after being banned in America and is now witness to a murder in Wong's Macau casino. However, before Bennie can find him, Connor is kidnapped by a Russian kingpin to answer for leaving his daughter pregnant. Rescuing him in Siberia, Bennie races against the clock to bring Connor back from Russia to Hong Kong but after Connor steals Bennie's passport and burns it the unlikely pair is forced to take a scenic route and embark on a perilous adventure from the steppes of Mongolia to the windswept dunes of the Gobi Desert with both the Russian and Chinese mobsters on their tail.