The septuagenarian women of the Summer Ridge Bridge Club have gathered in secret late one July night to check skinny dipping off their bucket list. But as Francine observes, the jittery members seem more obsessed with body issues and elaborate preparations than actually stripping down and getting in the pool. A pungent smell emanating from the pool shed provides a perfect distraction. When a dead body flops out, it's an answered prayer for Charlotte, since the first item on her list is to solve a murder.
Unfortunately for Charlotte and Francine, before they can discover who really killed the man, they must negotiate neighborhood tours of the crime scene, press coverage of their skinny dipping, an angry Homeowner's Association, a disastrous appearance on Good Morning America, media offers sought by a hungry publicist, and a clever killer.
