In the year 1002, the war between England and Denmark was intensifying and the English massacre a band of Vikings in Northumbria. A band of Jomsvikings, led by the intimidating Floki, visit Thorfinn's village to enlist Thors in their war against the English. Thors was their former commander, known as the Troll of Jom. He is obliged to join Floki, along with a ship and men, in order to protect the villagers from being taken hostage. Thorfinn and the young men in the village are excited by the prospect of going to war but they have little understanding of what it is really like...