Research in recent decades has shown that the gap between the human psyche and the psyche of animals is much smaller than it seems. Sometimes we are not even talking about an abyss, but rather a small gap. And first of all, this applies to animals such as killer whales, which are distant from us evolutionarily and in their way of life, but close in intelligence and sociality. How do these marine mammals live and communicate with each other? Can we understand their language? How do they build their families? What is the difference between fish-eating and carnivorous killer whales? Hardly anyone can talk about this more fascinatingly and authoritatively than Olga Filatova, a biologist, specialist in the field of acoustic communication of mammals and the behavior of cetaceans. Together with her and her colleagues, the reader will go to Kamchatka, Chukotka, the Commander Islands, where whale research is being carried out, will observe the progress of difficult and exciting expeditions, will learn how the history of orca captures in Russia began and ended and what role they played in the fight against illegal capture scientists.