"Bake me a brazzle, Felix, you're looking good!" said Snakeweed. "Archie and I have had a Ripping time over here - but now we want to go back. And I'm afraid we need You." Snakeweed - the villainous japegrin who followed Felix home - is at large in the real world. He has failed to set up his spell-potions business and is ready to go home. All he needs is the enchanted formula hidden in Felix's notebook. Unfortunately, Snakeweed's visit to Felix ends in disaster with a spell that turns Felix's parents to stone - and then starts spreading. To find the countercharm, Felix must return to the back-to-front world he discovered last summer. But when he gets there, he discovers it horribly changed and his extraordinary friends in a terrible fix. Can he save Both worlds in time?