Attorney Kyra Gibson has a lot on her mind this Thanksgiving. She's been working long hours on a multi-billion dollar corporate merger, her family is visiting from London, and her relationship with former police detective Tarek Collins is heating up. When she and her companions are invited by her aristocrat client to attend a formal gala at a historic mansion on Chappaquiddick, Kyra reluctantly agrees.

But Chappy is more than just a playground for the wealthy. It's a wild, remote place cut off from civilization. When the first body is found, the occupants are worried. Was it an accident or murder? When a second guest is brutally killed and then a third, there's no doubt and the guests fearfully turn on each other. They are locked in a house with a murderer picking them off one-by-one. Kyra, her best friend Chase Hawthorn, and Tarek must survive the night and find the killer, or one of them could be next.