Middle school student Henry and his mother have just moved to the strange town of Ravens Pass and their new apartment is not only dirty and smelly, it also seems to be haunted by the former tenants.

Walter lives near the top floor of a tall apartment building, where one night his habit of jumping on his bed leads to a tumultous fall through floor after floor, collecting occupants all the way down.

Jess needs a fresh start. She's broke and alone, and she's just left her job under less than ideal circumstances. Her half-brother Ben didn't sound thrilled when she asked if she could crash with him for a bit, but he didn't say no, and surely everything will look better from Paris. Only when she shows up, to find a very nice apartment, (could Ben really have afforded this?) he's not there. The longer Ben stays missing, the more Jess starts to dig...

As she climbs the seven stories to her own apartment, a little girl imagines what happens behind every door she passes.

"When the missing button for their new apartment building's thirteenth floor suddenly appears, identical twins Mal and Colm are pulled into an eerie adventure in an parallel dimension" -- Provided by publisher.

Mr. MacDonald, an apartment super, turns his building into a four-story farm with hot and cold running sweet potato vines, ceiling carrots, carpets of cabbages, and other farm produce and animals, prompting all the tenants to move out.