Felix is back in the real world after his extraordinary adventure in The Divide. But so too is Snakeweed, the villainous japegrin, who's followed him home - and he needs the enchanted formula hidden in Felix's notebook. Snakeweed's visit brings disaster. He turns Felix's parents to stone and, worse than that, his wicked spell seems to be spreading like a sinister virus which could threaten the whole of life on earth. To find a countercharm, Felix must return to the magical palce he discovered the previous year. But when he gets there he finds it much changed, and his unusual friends in a horrible fix.