Marlow has always lived in unusual places. But when she accepts a position as a live-in property guardian, she finds herself moving somewhere she swore she'd never return to.

Right from the start, she knows it's a terrible mistake. The elegant Victorian school is due to be turned into luxury apartments, but its eerie, empty corridors are full of Marlow's worst memories.

And now something sinister is happening on the site. One of the other tenants has disappeared without warning, and Marlow suspects that the nine other guardians know far more than they're letting on. She's determined to find out what happened to the missing woman - but which of these strangers can she trust?