After trick-or-treating, Max, Emma, and Coco fall asleep - but their Halloween costumes magically come to life! Together, they discover that the town's biggest jack-o'-lantern has gone missing. The kids and their living costumes set off on a moonlit adventure to find it before sunrise. Along the way, they meet friendly ghosts, giggling bats, and glowing pumpkins. In the end, they return the jack-o'-lantern and learn that friendship and imagination keep the magic alive.