During World War 2 Polish skiers take up a fight against the Germans and become couriers, delivering mail to Budapest.

Matylda reflects on her life on her 30th birthday.

WWII. Zyga, one of the Resistance soldiers in Kraków is arrested by Gestapo. Soon later the Germans make a number of other arrests and Zyga is accused of being an informer.

Raised by the monks, Stanisław gets involved in a scheme to murder the king.

A group of juvenile delinquents working in a shipyard try to clear themselves of a false accusation.

Major Henryk "Hubal" Dobrzański refuses to surrender to the Germans in the wake of the 1939 campaign and continues to lead his regiment in guerilla warfare against the invaders.