This new chapter of the epic "300" saga takes the action to the sea, where Greek general Themistokles battles invading Persian forces led by Xerxes and the naval commander Artemisia.

This new chapter of the epic saga follows the events before, during and after the King Leonidas and a force of 300 men fought the Persians at Thermopylae.

While the Persian Army under the command of Xerxes and Artemisia marches towards the major Greek city-states, Themistocles leads the charge against the invasion by making an alliance that will change the course of the war.