On the deserted shore of Lake Baikal, the body of a fisherman was found. He died of a heart attack. Felix Verbin begins investigating the case to learn about an old expedition to the mysterious Ryty Mak (Rytom) Cape, where all participants are considered to have perished, and how it is connected to the terrible events in modern Irkutsk.
Baikal is an ancient sacred sea where legends become real, filling life with mystery. Some people try to study the mysteries of Baikal scientifically; others believe they are mystical in nature. There are those who want to avoid unusual phenomena, and those for whom turning to mysteries is the last chance at salvation. But everything has a price โ and it can be very high.