Summer, 1946. The Cousteau family - Jacques, his wife Simone and their two children Philippe and Jean-Michel - live in their beautiful house by the Mediterranean sea. By day they dive, by night they watch the stars.

Jacques lives and breathes adventure and with his invention, the aqualung, his recently acquired vessel the Calypso, and a crew of free-spirited adventurers he is ready to cross the world's oceans.

Jacques is willing to sacrifice everything to achieve his dream.