The film follows Brad Avery (Paul Seranne) and Unit 56, a secret hit squad of the Lovian Secret Service. Unit 66 is re-united after 10 years. Their mission: to enter the Colombian jungles, infiltrate the base of the "Columbian Guerrilla" and kill its members and leader, Marco (James J.K. Wilson), who are intent in overthrowing the government. They embark on a dangerous mission, battling man-eating piranhas, armed natives and "guerrilleros" themselves until they finally reach the guerrilla's hideout and engage in a long gunfight which they eventually win.