A military vessel on the search for an unidentified submersible finds themselves face to face with a giant shark, forced to use only what they have on board to defend themselves from the monstrous beast.

After its victory over Leonidas' 300, the Persian Army under the command of Xerxes marches towards the major Greek city-states. The Democratic city of Athens, first on the path of Xerxes' army, bases its strength on its fleet, led by admiral Themistocles. Themistocles is forced to an unwilling alliance with the traditional rival of Athens, oligarchic Sparta whose might lies with its superior infantry troops. But Xerxes still reigns supreme in numbers over sea and land.

Hiding out for years in an isolated cabin, Norman Nordstrom has taken in and raised a young girl orphaned from a house fire. Their quiet existence is shattered when a group of kidnappers show up and take the girl, forcing Norman to leave his safe haven to save her.