Dutton Hatfield, played by Jeff Speakman, is working for the American embassy. He finds himself inside a biochemical weapon laboratory when terrorists headed by Colonel Baron (played by TimeCop villain Ron Silver) take over the place. Baron is looking for a sample of a deadly virus that is being developed inside the facility.

Kick-box champion David Sloan arrives in Rio de Janeiro for an exhibition fight. He and mentor Xian take pity on Brazilian rascal Marcos Coasta, an urchin who offers guide services but routinely steals from tourists for himself and his older sister Isabella. David is shocked when he sees how his Argentinian opponent Marcelo needlessly abuses a courteous local sparing partner. That's the doing of his evil US manager, Lane. He has nasty plans to force David to cheat and runs a white slavery racket.