Asya was raised in an orphanage. At the age of sixteen she hooked up with a thief who taught her how to break into cars, open locks with a lock pick, and to use a knife. And only support of the director of the orphanage saved her from detention, when her boyfriend had got into prison. Now Asya works as a confectioner in an expensive restaurant and tries to forget the past. Her only close person is the director of the orphanage, whom she meets in Aviation Museum every week. After one of such meetings the director gets murdered. The only suspect is the young mechanic Senya, who was restoring old planes in the museum and fled right after the crime. Asya, using thieves' skills, finds Senya faster than the police, but finds out that he did not kill anyone.