In the ancient Battle of Thermopylae, King Leonidas and 300 Spartans fought to the death against Xerxes and his massive Persian army. Facing insurmountable odds, their valor and sacrifice inspire all of Greece to unite against their Persian enemy, drawing a line in the sand for democracy.
In the Old West, a gang of Montana horse thieves buys a small farm next to the ranch of a man named Braxton who is an enemy of the gang, as well as their latest target. The leader of the gang, Tom Logan, stays behind when the gang goes to Canada to rustle some horses, and begins to like farming, and Braxton's rebellious daughter Jane. But Braxton hires a psychopath to help him stop the rustlers, who uses unusual methods and disguises to hunt down the members of Tom's gang. Tom, however, has no intention of allowing him or Braxton get him.