Every crescent moon, Nutella vanishes. Not through doors. Not through walls. She just... disappears.

When JJ and Daniel decide to follow the ghost dog's trail, they uncover glowing pawprints, shifting hallways, and a secret chamber guarded by moonlight.

With Luna's help-and a flickering cat named Umbra-they discover Nutella's midnight mission: protecting something ancient, powerful... and not meant to be touched.

To keep the castle safe, they'll need courage, curiosity, and snacks.