The third-grade students in Room Three at Bailey Elementary are notorious for breaking teachers. They are loud, they are rowdy, and they are completely out of control Until Mrs. Jeepers arrives from Transylvania.She moves into a spooky old house, wears a mysterious green ribbon around her neck, and tames the wildest class in school with just one piercing, glowing stare.Now, four classmate detectives—Eddie, Liza, Melody, and Howie—are on the case. They notice she hates garlic, avoids the sun, and carries a suspicious amount of monster lore. They know the terrifying truth: Mrs. Jeepers (Jenna Ortega) is a vampire.Can a group of eight-year-olds stop their supernatural instructor before the final bell rings? Or will they be doomed to detention forever?