Rumor has it that Captain Kidd buried treasure on Mooseamuck Island. But when an old pirate chest is unearthed, the contents reveal a deadly surprise that plunges the island into the middle of a sixty year old murder mystery. With fingers pointing at several of our favorite Islanders, Dom and Claire must team up once again to get to the bottom of things. A twisty path of suspects and clues, brings them to the horrifying realization that one of their closest friends may be involved. When another murder strikes fear into the hearts of the Islander's, Dom and Claire team up with an unlikely ally in order to save the island from a dangerous killer who thinks they can get away with murder.