We see the story of the battle through the eyes of Jedrek - a young boy who went through the hell of the gulag and left Russia with the Anders Army as one of thousands of orphans. The time of captivity changed him from a boy from a good family into a schemer and petty thief who will do anything to survive. However, meeting the soldiers of the II Corps and the awakening love for the nurse Pola will make Jedrek undergo a profound transformation. Soon, a decisive attack on the monastery, defended by German troops, located on the hills of Monte Cassino is about to take place at the front - this spectacular battle will decide about the lives of many soldiers and the further attack of the allied army in Italy, and will change Jedrek's life forever.