King Mortuus seeks to unlock an ancient prophesy and unleash dark forces of Sceadu on our world - he is just missing the final element: four child sacrifices. Then, Isabella, her brother, Emilio and their cousins cross over into the land of shadow, following discovery of a long-forgotten book written by an old explorer whose adventures once led him to Sceadu.Unless the children can thwart Mortuus and his hordes of ghouls, imps and faeries, the world they love is doomed.