Children end up in Ancient Greece, where they learn the laws of physics from Archimedes.

In the distant city of Blagoveshchensk, a father and his two sons, Rodka and Kostya, live together. After graduating from college, Kostya works as a surgeon and suffocates from the "greyness" of others, and 15-year-old Rodka suffers from the inability to help people. One day, a young woman appears in their house, whom Kostya brings.