Freya is an ordinary girl living in modern Britain, but with a twist: people still worship the Viking gods. One evening, stuck with her dad on his night shift at the British Museum, she is drawn to the Lewis Chessmen & Heimdall`s Horn. Unable to resist, she blows the horn, waking three chess pieces from their enchantment; the slaves Roskva & Alfi, & Snot the Berserk. They are all summoned to Asgard, land of the Viking gods, & told they must go on a perilous journey to restore the gods to youth. If Freya refuses she will be turned into an ivory chess piece but, if she accepts her destiny & fails, the same terrible fate awaits her.