A diamond smuggling operation goes wrong when an ordinary Soviet citizen becomes unwittingly involved, and the criminals are forced to court him to retrieve their diamonds.

Yuriy Nikulinas Semyon Semyonovich Gorbunkov
Nina Grebeshkovaas Nadezhda Ivanovna Gorbunkova
Nonna Mordyukovaas Varvara Pliushch
Svetlana Svetlichnayaas Anna Sergeyevna
Anatoliy Papanovas Lyolik
Andrey Mironovas Gennadiy Kozodoyev
Stanislav Chekanas Mikhail Ivanovich, captain
Vladimir Gulyaevas Volodya, lieutenant of militsiya
Yevgeniya Melnikovaas old lady
Andrey Faytas salesman of lottery tickets
Igor Chernykh