Why are we so concerned about ancient objects, ancient legends and tales? Is it because we are trying to find in them the wisdom that will help us make the right decisions in modern life? The heroes of the novel continue their search for the ancient treasures of Professor Somov. The lighthouse keeper and Kostya, armed with the professor's map, follow the trail of treasures in the catacombs... And at this time, Katya, for some unknown reason, faints on the street. To save her life, doctors insist on terminating the pregnancy. Katya wants to keep the child. Mother persuades Katya to listen to the doctors. In her new life with Kostya, Alexei’s child should not stand between them...