Retired schoolteacher Jessica Fletcher is shocked to find out that not only did her nephew send her manuscript to a publisher, but it's been accepted! Jessica is caught up in a whirlwind of publicity tours, book signings, and public appearances, but everything takes a turn when she attends a costume party and a private investigator dressed as Sherlock Holmes ends up facedown in the pool, shot. Jessica initially tries to stay out of things until her nephew Grady becomes the prime suspect, and Jessica decides to take matters into her own hands while fighting her attraction to Preston Giles, the first man to interest her since the death of her husband Frank.