Charlie believed that his grandfather had sold his house to his tenant, Martin. So when Martin dies, Charlie is surprised to discover the house was his own inheritance, and then he and his cat, Diesel, find a literal skeleton in a closet. As Charlie investigates his family history, he encounters many people who might have been motivated to take a life. But in this 14th outing (after Cat Me If You Can), Charlie knows that secrets have a way of finding their way back to haunt the present.