Banished from their homeland by their own king, a group of ruthless Vikings bear down on Britain, intent on plunder and pillaging. Under the command of their daring leader Asbjörn (Tom Hopper), they embark on a dangerous mission: to rob the monasteries of their treasures and with it to buy back their freedom. Their journey is disrupted however, when they are caught in a vicious storm, which leaves them shipwrecked on the Scottish coast. Stranded behind enemy lines, their only chance of survival is to make it to distant Viking-settlement Danelaw. En route, the Vikings successfully capture the feisty Lady Inghean (Charlie Murphy), daughter of King Dunchaid (Danny Keogh). The banished warriors seize their opportunity for a high ransom, but King Dunchaid, well-prepared in battle, summons his most ruthless mercenary army the 'Wolf Pack' – a band of men feared for their cruelty across the land. It is only with the help of a mysterious monk called Conall (Ryan Kwanten), that the Northmen finally manage to escape from the `Wolf Pack` and their merciless leaders Hjorr (Ed Skrein) and Bovarr (Anatole Taubman). As Conall leads the Vikings through the only safe route to Danelaw – the long-forgotten "Path of the Serpent" – a relentless race against time begins, a hunt for life and death.
