Enzo (Jean Reno, Léon, The Da Vinci Code) and Jacques (Jean-Marc Barr, Breaking the Waves, Dogville) have known each other for a long time. Their friendship started in their childhood days in the Mediterranean where they shared a love for diving. After Jacques' father dies in a diving accident, the two lose contact.

Now an adult, Enzo is living in Sicily where for six years he has been the uncontested free diving world champion. He sends for Jacques, who is living in the Peruvian Andes, and insists that he competes for the title. Jacques comes to Sicily and easily beats Enzo. The competition mounts as each man dive at increasingly life-threatening depths. But when Jacques' girlfriend Johana (Rosanna Arquette, After Hours, Crash) arrives from New York and pleads for the risk-taking to stop, events takes an unexpected turn, leading to an unforgettably dark, mysterious, and torturously beautiful conclusion....