Former employee of the detective agency "Bars" Marat Kalitin goes to the Pamirs to understand on the spot the mysterious events in the area of the Yazgulem ridge. He investigates an explosion in the tunnel where the film was filmed and the disappearance of people that followed the explosion. Marat hopes to find Larisa, who worked in the film crew, at the request of her husband, but Larisa is found dead. Who's the killer? And is the death of a young woman connected with the gold nugget she found? It gradually becomes clear that the roots of strange events go back to ancient times and are connected not only with disappeared earthly civilizations, but also with the life of other planets.