The heroic struggle of Polish post office workers in Gdańsk on the first day of World War II.

Bronisław Dardziński
as Kowalski

Włodzisław Ziembiński
as Postman Rajca

Kazimierz Wichniarz
as Kunert

Stanisław Jasiukiewicz
as Lt. Konrad Guderski

Jerzy Sliwa
as Postman Barcikowski

Piotr Fronczewski
as Boguś Barcikowski

Hanna Zembrzuska
as Irka

Jan Machulski
as Janek

Irena Netto
as Erna Pająkowa

Danuta Królska
as Trudka