When her older sister is found mysteriously drowned in the river that cuts through their small coastal town, Soojin Han disregards every rule and uses her ancestral magic to bring Mirae back from the dead. At first, the sisters are overjoyed, reveling in late-night escapades and the miracle of being together again, but Mirae grows tired of hiding from the world. She becomes restless and hungry . . . Driven by an insatiable desire to finish what she started in life, to unravel the truth that crushed her family so many years ago, Mirae is out for revenge. When their town is engulfed by increasingly destructive rain and a series of harrowing, unusual deaths, Soojin is forced to reckon with the fact that perhaps the sister she brought back isn’t the one she knew.