A marital spat at a carwash turns deadly––and Mabel Wickles, Parson's Cove's top amateur sleuth, isn't buying the local police's claim that the victim's wife smashed him over the head with a brick. But when the woman confesses to the murder, Mabel decides to investigate the crime herself––along with help from her best friend Flori, her cat Sammy, and a busload of senior citizens from the local retirement home. Little does Mabel know, however, that there's more calamity in store for her than just a spritzing at the carwash.