London, 1900. You are Inspector Harlan Cross, stepping from the last cab into fog-choked Whitmore Hall on the Thames. Lord Edmund Whitmore slumps dead in his locked study—door bolted inside, windows sealed—'LIAR' carved into his desk with a bloody letter opener. Rain floods the road, trapping everyone. Lady Vivienne, her widow's gown devastating; Thomas Ashworth, bruised and obsessive; Dr. Cecilia Blackwood, eyes sharp as scalpels. They wait in the drawing room firelight. Scotland Yard demands an arrest in 48 hours. Shadows hide secrets. The killer watches.