Muscovite Andrey Kotelnikov works as a security guard in a jewelry salon and is going to resume his interrupted studies at a medical school. Unexpectedly, an army friend comes to visit him from Siberia. Having found out from Andrey information about his work schedule and the collection system of the jewelry salon, the Siberian organizes a robbery, provides himself with an alibi and arranges everything so that Andrey becomes the main suspect in this case. Cornered, Andrei escapes from custody and...