Wendy Becker believes the Black Hills Outdoor Club's healthy diet and exercise will help her husband, Franklin, focus on a new career. More importantly, she wants to fit into her now-too-tight jeans. As guests, Wendy and Franklin embark on a club backpacking trip, but when another guest is murdered, club members are concerned only about their upcoming dinner. Soon, the Beckers find themselves up to their bootlaces in trouble. The Motorhome Murder Mysteries follow Franklin and Wendy Becker as they take their mid-life crisis on a cross-country RV trip. Along for the ride are their basset hound, Mad Dog; cat, Estancia; and curmudgeonly motorhome, Grizelda.