Fear is the price of survival. And Lilith Rain has only thirty nights to pay.

For generations, the Rain family has been bound to an ancient pact known as The Tithe of Dread-a supernatural agreement that grants prosperity in exchange for one heir's terror. This year, the debt falls to Lilith.

Locked inside the decaying Blackwood Cottage, she must endure thirty days of psychological torment while an unseen entity-The Watcher-feeds on her fear. The walls creak like they're breathing, shadows linger too long, and dead crows appear as warnings. Sleep slips away. Reality bends.

Lilith soon understands: The Watcher does not want her life. It wants her mind.