Demons in the Jungle

When you go into the jungle to kill, you'd better be ready to kill a piece of yourself.

Tommy Volker, age 22, and his friends, are adventuring across the world in search of excitement and danger. With Tommy's bank account having bulged from an unexpected inheritance, the possibilities are near-endless as they try to wander off the tourist trail at every opportunity.
Tommy and the gang are in Brazil when they're approached by an eccentric man named Amy who makes them a disturbing offer: for $120,000, they can go to the jungle, hunt, and kill a human being. His friends are appalled, but Tommy is intrigued, so he sneaks away and accepts the offer without looking back once.
But the jungles of the nearby Chawe Islands have plans for Tommy. Within hours, he loses most of his equipment and is badly wounded. Amy refuses to pick him up, coercing Tommy to honor the deal by keeping one of his friends captive as insurance. Tommy, armed only with a knife, is forced to turn back into the darkness of the jungle and find out what sort of man he really is.