Aldo the Witcher and Gus the Cat lived a happy life until the day when the Great Inquisitor came to catch and burn all witches, warlocks and wizards in the kingdom. Poor Aldo was arrested and sent to jail, while the cat managed to run away. Now Gus, traveling in an old flying kettle, is his only hope. Help Gus to get Aldo out of prison by finding the legendary Skeleton Key. Gather objects and use them, search for hints in castles and towers, explore graveyards, cellars, and even the twilight world of sleeping ghosts.