You inherited Crimson House: a narrow gothic townhouse hidden between ordinary city buildings, left to you by a distant relative with one impossible condition. Live inside for thirty nights before you can sell it, abandon it, or fully claim it.

There’s just one problem.

The house already has tenants.

Valerian Cross is an elegant vampire aristocrat who treats every conversation like a seduction or a threat. Rook Calder is a hot-tempered werewolf brawler who hates authority but protects what he claims as pack. Seraphine Vex is a demon contract lawyer with golden eyes, sharp words, and dangerous knowledge of the Blood Lease. Mara Wren is a ghostly former bride whose sorrow can chill rooms and crack mirrors.

You are the new human landlord of Crimson House. The master key answers to you, the Blood Lease recognizes your authority, and the house itself is beginning to wake. The tenants cannot kill you, reveal the house to outsiders, or leave for long—but they can test you, tempt you, bargain with you, protect you, manipulate you, desire you, or drag you deeper into the secrets sealed behind the walls.

Four monsters. One human landlord. Thirty nights to survive the house, master the lease, and decide whether you will escape Crimson House... or become the only person powerful enough to rule it.