At the storm-isolated Blackwood Auction House, appraiser Ethan Walker uncovers a hidden ninety-ninth painting by the reclusive artist Jasper Hayes-an artwork that does more than depict gothic horror. It reveals a meticulously concealed crime tied to the powerful Blackwood family. As the storm cuts the estate off from the world, Ethan realizes the guests trapped inside are not just collectors and scholars, but potential suspects in a decades-old murder encoded in paint, shadow, and silence.