Never one to follow societal conventions, Agnes Sharp has opened up her house in the English countryside to fellow unruly seniors hoping to avoid the nursing home. When the police arrive to inquire about the fatal shooting of a neighbor, the residents are shocked—mostly because the police don't seem to know about the body in their own backyard. This darkly funny mystery follows a quirky group of elderly amateur detectives as they attempt to solve one murder while covering up another (with the help of a tortoise named Hettie!).