Around the Crozet Islands, here is the incredible odyssey of a family of Sperm Whales facing rapid changes in their environment. From the stormy surface to the eternal darkness of the abyss, several generations of these deep-sea divers encounter men and their “toys”: harpoons of yesterday, and fishing lines of today. Once victim of whale hunting, now accused of stealing fish, a sperm whale shares its private life with us. And what an immersion! We discover in turn its mysterious sonar, its competitors like orcas, and also the strange world of its neighbors - the deep-sea monsters. Amongst them, a revelation: the biggest squid ever filmed in its natural environment, almost 15 feet long. Come and discover the depths of the Crozet abyss…