950 AD - it's Bjarki's 10th birthday. To celebrate, he and his friends sail to Log Island on his Dad's longship and go exploring there. But then Bjarki finds a magic hammer and suddenly - he's off on an unexpected adventure! Finding himself in a land far from home, he meets Alvi. Led by the magic hammer's clues they go on a mystery tour around Wirhale, never knowing what will happen next - or even when?!