A new Dark Age has falled across Britain; gods and monsters walk the land. In this new time, myth and legend has become realtity; nothing is quite as it seems. The plague came without warning. Nothing could stop its progress: not medicines, not prayer. The first sign of the disease is black spots at the base of the fingers; an agonising death quickly follows. But this is no ordinary disease... Caitlin Shepherd, a lowly GP, is allowed to cross the veil into the mystical Celtic Otherworld in search of a cure; her search takes her on a quest to the end of a land of dreams and nightmares to petition the gods. Caitlin is humanity's last hope, but she carries a terrible burden...