Agnes, Charlie, Marshall and the other elderly residents of Sunset Hall are going stir-crazy at home. And to top it all off, another series of murders is rocking the hamlet of Duck End. So when Edwina manages to slip onto Marshall’s computer in an unobserved moment and promptly wins a stay in an exclusive coastal hotel in Cornwall, the Sunset Hall crew waste no time in joining her. But Agnes sees something unsettling from the terrace of the hotel: two figures in hoods walk away from the hotel along the cliffs, but only one returns. Worried she’s witnessed a murder, Agnes tells the others. At first nobody really believes her. But when the hotel ends up isolated from the outside world after a storm, it becomes clear that a murderer really is on the loose --- and they’re trapped, just like all of the other guests.

It has been an eventful morning for Agnes Sharp and the other inhabitants of Sunset Hall, a house share for the old and unruly in the sleepy English countryside. Although they have had some issues (misplaced reading glasses, conflicting culinary tastes, decreasing mobility and gluttonous grandsons), nothing prepares them for an unexpected visit from a police officer. A body has been discovered next door. Everyone puts on a long face for show, but they are secretly relieved the body in question is not the one they’re currently hiding in the shed (sorry, Lillith). It seems the answer to their little problem with Lillith may have fallen right into their laps. All they have to do is find out who murdered their neighbor, so they can pin Lillith’s death on them, thus killing two (old) birds with one stone (cold killer).