Like Jim Brown, Fred Williamson went from a successful NFL career to playing blaksplotation heroes in films like this. His character here is an international courier who is double-crossed by his employers (who turn out to be involved in a drug syndicate). So Fred decides to do what guys like him do in these movies, get revenge. Fred spends a bit of time in Los Angeles and a bit more time in Los Vegas but a lot of this movie was set (and filmed) in Hong Kong. Typically of American films set in Hong Kong, Williamson's contact on the Hong Kong police is an upper-crust Englishman who looks like he should be hailing a taxi in Trafalger Square. In 1973, 1997 and the Chinese handover was still a long way off in the future. Like all films starring Fred "Hammer" Williamson, its a bit of an acquired taste. Do not expect another ENTER THE DRAGON.