Henry and Beth Greenway are retired in a remote town in England. Between book clubs, tea and gardening, life in the Greenway home is routine, but when a red-cloaked stranger begins delivering them letters in the early hours of the morning, the elderly couple begin to rethink their lives, and the safety of the town. It's when murder strikes that the Greenways begin to realize how true the stranger's predictions are, and begin to suspect whoever the person under the red cloak may be for murder.