Explosions are raging in one of the ports in the territory occupied by the German fascist invaders. An old and experienced military leader, Admiral Reinhardt, arrives to investigate these emergencies. Together with the head of the Gestapo, SS Standartenfuehrer Hübe, he takes all measures to suppress the activity of the partisans, raids and arrests, but all in vain. Underwater sabotage continues. A detachment of fighters with experience of submarine warfare is sent from Italy to fight the demolitions.
| Actor | Role |
|---|---|
 Irina MiroshnichenkoGalina Ortynskaya | Galina Ortynskaya |
 Aleksandr BelyavskiySergei Kulagin | Sergei Kulagin |
 Yuri VolkovHübe | Hübe |
 Vladimir Yemelyanovadmiral Reinhardt | admiral Reinhardt |
 Vladimir VolchikNorte | Norte |
 Sergei Golovanovvon Goetz | von Goetz |
 Yelena DobronravovaWilma | Wilma |
 Anatoliy Verbitskiydel Sarto | del Sarto |
 Marianna StrizhenovaAdamova | Adamova |
 Stepan KrylovGordeyev | Gordeyev |
 Henrikh OstashevskyiYaroshchuk | Yaroshchuk |
 Gennadi VoropayevFarino | Farino |
 Les SerdyukBellavista | Bellavista |
 Oleksandr MovchanGvido | Gvido |
 Yuzef MironenkoKauf | Kauf |
 Lavrenti MasokhaLogunov | Logunov |
 Aleksei SmirnovBychkov | Bychkov |
 Oleg KomarovPlyushchev | Plyushchev |
 Igor Shelyuginvon Regel | von Regel |
 Valerii PanarinPrado | Prado |
 Borys SavchenkoSandro | Sandro |
 Vladimir Kislenkowaiter | waiter |