Maudie isn't your typical twelve-year-old girl--she's the ghost of one. Along with her best friend Kit and little brother Scratch, she haunts a cottage in the woods, doing her best to scare off the vacationers and forget her old life.

But everything changes when Kit and Scratch go missing. Maudie knows something terrible must have happened, and she's right: Longfingers--a monster from her own nightmares, with spidery fingers and needle-sharp teeth--has stolen her friends away.

Longfingers makes Maudie a twisted deal: find the key to a door in a mysterious cabin, or she'll never see her friends again. With nobody else to turn to, Maudie has to beg for help from Gianna, the living girl she's been haunting. Together, the girls search for a way to thwart the monster and save Maudie's friends.

But Maudie's keeping secrets about the cabin and her past. Unless she finds a way to finally face the truth, she may never be able to rescue her friends from Longfingers's grasp.