This is the true story of a family of titans: around thirty sperm whales, fifteen females and eleven calves, who live off the coast of Mauritius, plus the large males returning from months of hunting in the southern seas. For the first time, this film will tell the story of a family of sperm whales. It allows you to live among a family of sperm whales, witness the first breastfeeding of the calves, understand the functioning of the clan, the different social functions of the females, the unsuspected importance of the males. And follow their extraordinary destinies, with their joys, their moments of tenderness, their dramas.