Vadim Potapovich Khvorost, a young architect of underwater cities, is almost hopelessly wounded and, in order to save his life, ends up on the planet Arzyuri for the second time, simply because he was swapped with a double. Looking around, he realizes that he does not want to look like his double. Life here is hard, and then there’s a double murder, a confrontation with nature, personal troubles that ended rather pitifully... But I want to live. Against all odds! Will it be possible?