When Jenks Ellington experiences a sudden, alarming sense of panic about her identical twin sister Gigi, she has to wait until nearly midnight before learning the reason for her unease: Gigi has drowned while diving for artifacts in a Low Country river near Beaufort, South Carolina. Although Beaufort County detective Seth Mason is suspicious of Gigi's diving partner, there is no evidence of foul play. But, when Gigi's Port Royal home is broken into and ransacked, Jenks discovers two clues -- one of which leads her to the home of a local Gullah medium. In a painstaking search for answers, Jenks delves more deeply into her twin's life. Along the way, her bond with detective Mason reaches unexpected depths. And what secrets could medium Meta Jane be holding? Was Gigi's death really an accident?