Young KGB agents investigate a complex murder case with several suspects.
Nikolai RozantsevDirector
Baturin
Vasilchenko
Terekhov
Krasnyukov
Vladimir Semenovich Sotnikov
Tokarev
Tanya
Danilin
Irina - Sotnikov's stepdaughter
Valeri
Lieutenant
KGB officer
Polina Vasilevna
Malyshev
