5th century AD, the Roman Empire is on the verge of being conquered by the barbarians. The British princess Ursula is placed in a hopeless situation - the men of her country are fighting on the side of Rome in a last fierce attempt to resist the invasion of the Huns, and the women left alone are forced to defend themselves against the Saxons , Picts and red-bearded Celts. Ursula gathers an army of 20,000 girls, which manages to organize reliable protection of the borders of Britain. When the collapse of Rome becomes inevitable, she decides to take a desperate step - the female army will go to Italy for the Great Wedding of the Legions. However, politics, war and nature itself destroy the original plans. Ursula and her warriors find themselves face to face with the hordes of Huns destroying everything in their path...