A new command assignment transfers Colonel Verbov's group to the Pacific Ocean. The goal is to investigate the mysterious disappearance of the deep-sea combat station of the Perimeter system and the Kamchatka submarine sent to search for it. The situation is complicated by Russia’s eternal strategic “friends”, the Americans, who have declared this area of the ocean a zone of their interests, regardless of what is happening in the depths. And grandiose events are unfolding there that can bring the Earth to the brink of the apocalypse. And only the will and intelligence of people can stop this deadly slide into the abyss. If you have time, if you hear, if you understand...