On board the largest raft ever built, Joam Garral leaves Peru with his family to marry his daughter in Brazil. This raid of the Amazon is not without risk for Garral: 20 years ago, the latter, whose name was Dacosta, was unjustly sentenced to death in Brazil in a case of diamond theft. Sinister omen, a menacing character named Torres is invited aboard the Jangada and, after an attack of alligators, the justice comes to stop Dacosta.