1000 AD, for years, One Eye, a mute warrior of supernatural strength, has been held prisoner by the Norse chieftain Barde. Aided by Are, a boy slave, One Eye slays his captor and together he and Are escape, beginning a journey into the heart of darkness. On their flight, One Eye and Are board a Viking vessel, but the ship is soon engulfed by an endless fog that clears only as the crew sights an unknown land. As the new world reveals its secrets and the Vikings confront their terrible and bloody fate, One Eye discovers his true self.

Nine-year-old Frankie and his single mum Lizzie have been on the move ever since Frankie can remember, most recently arriving in a seaside Scottish town. Wanting to protect her deaf son from the truth that they’ve run away from his father, Lizzie has invented a story that he is away at sea on the HMS Accra. Every few weeks, Lizzie writes Frankie a make-believe letter from his father, telling of his adventures in exotic lands. As Frankie tracks the ship’s progress around the globe, he discovers that it is due to dock in his hometown. With the real HMS Accra arriving in only a fortnight, Lizzie must choose between telling Frankie the truth or finding the perfect stranger to play Frankie’s father for just one day…