The film opens with the inspection of Leonidas as a baby, followed by his admission into the Agoge at age 7. His trials in the Agoge are briefly touched on, showcasing him brawling with other Spartan boys and by age 15 is left out in the wilderness alone. It is alluded to that the rest of Sparta presumes him to be dead. It is at this point he's confronted by a large wolf and fearlessly defeats it. He returns to Sparta, claiming his kingship in the process. Years later, Sparta is approached by an emissary and his guards who warns of the impending defeat of Sparta by Xerxes and his Persian army. Leonidas, now grown and married with a young boy, defies Xerxes by killing the emissarys body guards and casting them all in addition to the emissary into a deep pit. Leonidas then seeks the approval of the Ephors, prophets to the ancient Greek kings, to lead the Spartan army to war against Persia. The Ephors consult their oracle and deny Leonidas permission to go to war, claiming that they must honor a sacred religious festival, else Sparta will fall. Leonidas suspects the Ephors motives, and bitterly returns home to his wife. It is soon revealed that the Ephors are being bribed by Xerxes with gold in order to withold Sparta from fully partaking in the war.
