Ari, Zeke, and Jez just can't ignore a challenge from the school bully, Tripp. There can't really be a haunted house in Blockville... right? When the trio enters the mysterious house on the hill Tripp dares them to explore the creepy top floor. What's the deal with all these doors? And why can't Ari and his friends find a way out? And wait... is that a giant spider?!"--Provided by publisher.