For the first time in over fifty years, the Trooping Fairies arrive in the small town of Clonbridge for their annual revels. Their arrival awakens other creatures, who have mischief and chaos in mind. Cat Donnelly and her friends spend their final day of school before midterm break swapping scary stories and planning the
ultimate trick-or-treating strategy. But with the Fairies back in town, this Halloween will be one where Cat has to face real danger and use all her wits and bravery to save those she loves.