Nate, Summer, Trevor, and Pigeon know the third and most diabolical White sibling, Camila, is still at large. When she finally makes her move, it comes in the form of the Dreams and Screams International Carnival arriving at their small California town. Rumors quickly spread about those visiting the carnival feeling compelled to return, visitors to the labyrinthine Funhouse disappearing for days, and the Big Top being truly bewitching.

When nightmares and weird dreams start to plague everyone who has visited the carnival, the worlds of magic and reality are both endangered. The friends are ready to fight, but the carnival forbids outside magic. Without their favorite enchanted treats, how can they salvage their sixth-grade year, rescue their families, and save their town?