In 1934, hoping to earn the $1,000 reward they both need, young Peter and Tunie team up with Tunie's bat, Perch, and an Egyptian boy, Horus, cursed and mummified at age ten, to find a ten-year-old missing girl, Dorothy James.
Bored with another normal, inky evening, bats discover an open library window and fly in to enjoy the photocopier, water fountain, and especially the books and stories found there.
When the students of St. Orlok's Elementary School for Vampires face a cheating werewolf in a game of casketball, nine-year-old Lee Price asks his friend, Boris the bat, for help.