Tough guy Thomas Beckett is a US Marine working in the Panamanian jungle. His job is to seek out rebels and remove them using his sniper skills. Beckett is notorious for losing his partners on such missions. This time he's accompanied by crack marksman Richard Miller, who's more of an office-type. Together they plan to seek out an important rebel leader, whilst avoiding a rogue marksman who frequents this part of the jungle.

Fitzcarraldo is an obsessed opera lover who wants to build an opera in the jungle. To accomplish this he first has to make a fortune in the rubber business, and his cunning plan involves hauling an enormous river boat across a small mountain with aid from the local Indians.