Martha's Vineyard has been home to Victoria Trumbull for most of her 92 years. Its magic, history, and picture-perfect calm are part of her very being. But one evening, Victoria hears something that doesn't quite belong: a scream followed by a splash and a sound of a car speeding away. She investigates and discovers a body on the outgoing tide. Despite interruptions from her granddaughter Elizabeth, the harbormaster Domingo, a swarm of Island locals, and a few mysterious visitors, Victoria manages to get in a good bit of detective work and still finds time to cook her traditional Saturday night supper of Boston baked beans. She even concocts a scheme to trap the killer. But she'll need to act quickly, victim number two has already been found.