The book of the world-famous explorer of the World Ocean Jacques-Yves Cousteau and the young biologist Yves Pakkale tells about the next expedition "Calypso", which took place off the coast of Patagonia and on the islands of the Tierra del Fuego archipelago. The main purpose of the expedition was to study the southern smooth whales arriving for the breeding season in the bays of San Jose and Golfo Nuevo .. The authors report many new interesting details about the manners, games, and marriage ceremonies of these marine giants. In addition, the authors tell about meetings with other animals of this corner of the world - guanaco, nanda, armadillos, a variety of sea birds. The expedition had another task - to find in the labyrinth of the islands of the Tierra del Fuego archipelago the last Indians of the endangered Kauakar tribe. The members of the Calypso team met with them and made sure that this people is on the verge of extinction.