The action takes place during the Second World War in the battle zone over the Black Sea coast. Soviet sailors track down an enemy submarine. Meanwhile, the commander of the Sea Hunter, along with one of the sailors, is not returning from intelligence. Young patriots Katya and Lida report to the boat about the signal of unknown friends who noticed a submarine. Thanks to this, Soviet sailors drown an enemy boat, and the brave reconnaissance Katya, who knows the mountain paths of the coast well, discovers a Sea Hunter commander and a seriously wounded sailor in one of the caves ..
Надежда Румянцева
as Katya
Павел Волков
as Makar Makarovich
Юрий Пузырёв
as leytenant Korolkov
Olga Khorkova
as Mariya Vasilyevna
Yuri Leonidov
as Ivanov, acoustic technician
Пётр Чернов
as kapittan-leytenant Aleksandr Nikolayevich
Евгений Леонов
as Cook
Nadir Malishevsky
as Kazachenko, sailor
S. Bebeshko
as Sailor
Нина Шорина
as Manya
Lyubov Baldina
as Lida
Mikhail Pinskiy
as Petya
