The doctor and biologist Alain Bombard, 30 years old, decides to prove 2 things to the world. Firstly, that a human being can live at sea, on a lifeboat without food, without water, with only a tent, a sextant, a fishing line, a net and a knife. According to him, mental strength is what makes you survive! Secondly, that a lifeboat can be seaworthy. A year earlier, to confirm his theories, he decided to coat his body with fat to withstand the cold and swim across the English Channel. And he succeeded! He feels ready for the great adventure.