Serving up mouthwatering shellfish, the Snowden Family Clambake has become a beloved institution in Busman's Harbor, Maine. But when new clues rise to the surface five years after the disappearance of Julia Snowden's mother's friend, the family business shifts to sleuthing . . . Julia and her mother, Jacqueline, have come to the exclusive summer colony of Chipmunk Island to attend a memorial service for Jacqueline's old friend Ginny, who's been officially declared dead half a decade after she went out for her daily swim in the harbor and was never seen again. But something seems fishy at the service--especially with the ladies of the Wednesday Club. As Julia and Jacqueline begin looking into Ginny's cold case, a present-day murder stirs the pot, and mother and daughter must dive into the deep end to get to the bottom of both mysteries . . .