Livia, a romantic short story writer, and her husband Stan, arrive at a country hotel for a "Murder Mystery" weekend. They are joined by Patsy and her husband Ashley, and Vi and Dorothy. Each receives an anonymous "Murder Mystery" game envelope. Someone has left extra notes for Patsy and Stan exposing Livia's and Ashley's illicit affair. Next, Shelley, the chambermaid, mysteriously disappears, and intrigue and suspicion deepens when one last uninvited guest arrives ...