Twelve-year-old Willow Ivan's family has run the Hotel Ivan for four hundred years. Through thick and thin, they've held on tight to their title as the Best Haunted Hotel on Mercer Street. That is, until the Hauntery--a corporate chain of haunted hotels--moves in down the street. As the Ivan's business fades, so do their ghostly staff. And Willow begins to worry that The Ivan's days are numbered.

Then Willow meets Evie, a Hauntery ghost who's forced to play the part of a Spooky Little Girl even though she longs to be a Terrifying Phantasm. So when Willow offers her a job at The Ivan, Evie accepts--but she doesn't tell Willow that she's still working for The Ivan's competition, for fear of losing her new job and friend.

Together, the girls come up with a plan to save The Ivan. But with The Ivan ghosts already fading and Evie's secret threatening to come out, will it be too late?