Youngster Sarah Quinn (Madison Iseman) lives with her mom Kathy (Wendi McLendon-Covey) and more youthful sibling Sonny (Jeremy Ray Taylor) in Wardenclyffe, New York. Sarah is endeavoring to get into Columbia University by composing a paper about dread. Kathy consents to watch Sonny's companion Sam Carter (Caleel Harris) while his dad leaves town. Sonny and Sam are endeavoring to begin a refuse cleanup business, and are called after school to tidy up a surrendered house. Inside, they discover a bolted original copy and open it, causing Slappy the Dummy to show up. They accidentally breath life into him by talking enchantment words found in his pocket. The book is later stolen by a harasser named Tommy Madigan (Payton Wich). At home, Sonny is chipping away at his science venture, a smaller than usual variant of Nikola Tesla's Wardenclyffe Tower. Slappy then uncovers he's alive to Sonny and Sam, and gets their trust by utilizing his enchantment to do the kid's tasks and homework. In the mean time, Sarah goes to involved with meet her sweetheart ...