Two men answer the call of the sea in this. Enzo and jacques really are a pair of friends who have now already been close since childhood, and that share a passion because of its game of free diving. Expert diver Jacques chosen to follow in the footsteps. To the bewilderment of scientists,'' Jacques harbors an extraordinary power to adjust his heart rate and breathing pattern from the water, to ensure his vital signs more closely resemble that of dolphins than men (he even considers a school of dolphins as his extended family). Since Enzo persuades a reluctant Jacques to compete against him in a completely free diving contest -- ascertaining who can dive deeper and longer without scuba gear -- Jacques meets Johana, a beautiful insurance investigator from America, and he finds that he has to choose between his love for his love of the sea.