Two children stumble into Banipal Witt, a secret world where cats walk upright and the sun itself transforms humans into felines. It's a place of wonder and danger in equal measure, ruled by its own strange laws. But danger looms. The sorceress Bubulina commands a terrible power: her touch turns anything living into a balloon, robbing creatures of their will and form. She's already corrupted Papdoll, a monster dog who was once human, and now she plots to seize control of the entire cat kingdom with him as her weapon. Only Toriyasu, Papdoll's former owner, has any hope of breaking the spell and saving his twisted friend. The clock is ticking. The group of determined cat engineers who've befriended the children have just one night to stop Bubulina before sunrise changes everything. What unfolds is a race through a fantastical landscape where friendship and determination clash with sorcery and despair.