Beloved Hotel Strange resident Mr. Snarf has been a bad ghost. He hasn't scared people. In fact, he's even made friends! Now some grumpy ghosts are taking him away from Hotel Strange. But the hotel's other residents set off to rescue him! They take to the clouds in a hot air balloon, searching for the Kingdom of Ghosts. Once they arrive, the ghosts put the Hotel Strange gang on trial—where they learn that some rules are important, but too many can be downright silly.