Frank Walsh is a skilled big-game hunter specializing in rare and dangerous species. He has recently caught an extremely rare white jaguar in the rain forests of Brazil and now expects to sell it to a zoo for a fortune. Frank books a ship to deliver the jaguar along with other animals to the U.S. However, authorities also need the ship to transport a notorious killer who must be brought to trial, and who, for medical reasons, cannot be transported by plane. On the way to the U.S., the criminal frees himself and releases dangerous animals and venomous snakes.