Franck, his girlfriend Sonia and best pals Ernest and Sam, head off to a luxury hotel in Brazil owned by Sonia's pompous father Alain. Franck is planning to propose to Sonia but attempts to win over her father prove disastrous. Ernest and Sam's antics in the background do little to further his cause. He hopes to prove himself by leading an excursion into the Amazon jungle but at the last minute Sonia's loud-mouthed grandmother joins the party and the trip takes a disastrous turn.