Twelve people arrive at a remote inn to spend the weekend. After dark, the doors and windows are locked, the lights go out, and someone starts murdering the guests. Is the murderer one of the twelve or someone else? Each guest must decide whether he or she should form a bond with any of the other guests, none of whom appear to be a murderer. Those guests, chosen specifically by the murderer, include a doctor, a judge, a private detective, a kindergarten teacher, a firefighter, a mystery author, a librarian, a taxidermist, a real estate agent, an insurance agent, a funeral director, and a computer programmer. Is the murderer one of them, the butler, or the owner, who is blind and confined to a wheelchair? Or did someone else find a way to sneak into the inn?