Erick, a young Viking warrior, joins forces with a rival clan in order to rescue a kidnapped princess from the great Midgard Serpent. It's a perilous task with a risk far greater than merely their own lives; by rescuing the princess, they might cause Ragnarök - the end of the world.

A millionaire philanthropist collects the famous Crystal Skulls trying to tap into their ancient powers. It is up to a team lead by a college professor whose father disappeared searching for the 13th skull to save the world when the first 12 skulls are united and reek havoc on the earth without the control of the 13th skull.