In this ferocious retelling of the Battle of Thermopylae based on the epic graphic novel by Sin City creator Frank Miller, King Xerxes of Persia amasses an army of hundreds of thousands, drawn from Asia and Africa, to invade and conquer the tiny, divided nation of Greece in 481 B.C. But when the advancing Persian forces enter the treacherous mountain pass of Thermopylae, they encounter Spartan King Leonidas and his royal guard of soldiers numbering just 300. According to legend, their valor and sacrifice inspired all of Greece to unite against the Persian foe, planting the seeds of democracy and ushering in the Golden Age of Greece.