The action takes place in a small Russian town where nothing ever happens. However, the peaceful life of the provincial residents is shattered when it is discovered that the body of a young woman has been found in the town. Apparently, she is the sister of Rita Tikhonova, a local police investigator, who disappeared many years ago. Law enforcement officers begin an investigation, during which Rita learns that she didn't know much about her close relatives. Some of them are not who they were believed to be.