St. Petersburg. Winter of 1917, the eve of the February Revolution. The maid finds in the room the corpse of the murdered tenant. In his pocket, a hotel account was found in the name of Karl Fischer, a well-known banker. An investigation is beginning. In the list of suspects - an agent of the secret police...
A son comes to Leningrad on the birthday of his mother. He is the director of a large Siberian construction, twice married, happy in work, and in family life. His second wife Lida is also here. She brought her son and daughter with her. The youth of the mother of the family fell on the 30s. Life practically did not change its principles and beliefs. And it's not clear to her children, and even more so grandchildren, for whom her ideals do not mean anything.
