Exercise with Three Unknowns (1979)

A determined criminal investigation unfolds after a robbery at a factory cashier. Two skilled criminals execute a daring heist at the facility's checkpoint, escaping in a strategically positioned getaway car. Major Dorokhov and Lieutenant Matushkin are assigned to investigate the details of the theft. Their interviews with witnesses reveal a complex dynamic between the criminals – one seemingly prevented the other from committing a violent act. This intriguing detail adds suspense to the investigation.