Deep in the dark waters of the Amazon jungle lives a fanged creature that could have been born in your worst nightmares - the vampire fish. To track down this monstrous-looking predator, Cyril embarks on a rugged expedition that will put him to the test. Carrying boats through massive falls, swimming after fish in caiman territory, and learning tribal hunting techniques are just some of the things Cyril must do as he pushes relentlessly deeper into the Brazilian forest after this elusive monster.