In a frozen winter of the year 709, a mysterious space traveler crashes in the inhospitable lands of Scotland. Kainan, the last survivor of a devastated planet, embarks on a desperate mission: to hunt down a monstrous predator named Moorwen, which has escaped from captivity on the crashed ship. This being, of massive size and an insatiable thirst for blood, threatens not only Kainan but also the Viking tribes that inhabit the region.
Upon encountering a group of warriors, Kainan quickly becomes a crucial figure in the fight for survival. His advanced knowledge and combat skills give him the necessary edge to lead the men in this fierce battle. However, his past and the loss of his home haunt him, lending his story a melancholic tone that intertwines with the intense action.
As the threat of the Moorwen intensifies, Kainan forms unexpected bonds with the warriors, especially with a brave woman named Freya, who challenges the customs of her time. Together, they must join forces to confront the creation that Kainan should never have been responsible for. Blending science fiction with Viking mythology, the story explores themes of redemption, courage, and the power of community in the face of an unstoppable enemy. As the final battle approaches, both Kainan's fate and the future of humanity hang by a thread.