 When the ambitious King Xerxes of Persia invades Greece with his huge army to extend his vast slave empire, the brave Ling Leonidas brings his personal body guard army composed of three hundred warriors to defend the passage of Thermopylae, the only way by land to reach Greece. Using courage and the great battle skill of his men, he defends Thermopylae until a treacherous Greek citizen tells King Xerxes a secret goat passage leading to the back of Leonidas s army. Meanwhile, his wife Queen Gorgo of Sparta tries to convince the council to send the Spartan army to fight against the Persians.