It's 1940. German forces are prevailing over Allies across Europe. The crew of the Polish submarine, now serving in the Royal Navy, is waging a heroic fight against the invisible enemy.

Tomasz Ziętek
as Jan Grudziński

Mateusz Kościukiewicz
as Andrzej 'Pablo' Piasecki

Antoni Pawlicki
as Marian Mokrski

Filip Pławiak
as Jerzy Sosnowski

Tomasz Schuchardt
as Florian 'Trzonek' Roszak

Adam Woronowicz
as Henryk Kotecki

Rafał Zawierucha
as Klops

Jan Butruk
as Henryk Kamiński

Michał Czorny
as Alojzy Engelbert 'Stołowy Lolek' Gettka

Michał Darewski
as