Ten years ago, Cat's volatile mother, Mary, left her at her grandmother's house with nothing but a deck of tarot cards. Now seventeen, Cat is determined to make her life as different from Mary's as possible. When Cat's grandmother dies, she's forced to move to New Orleans with her mother. There, she discovers a picture of Mary holding a baby that's not her, leading her to unravel a dark family history and challenge her belief that Mary's mental health issues are the root of all their problems. But as Cat explores the reasons for her mother's breakdown, she fears she is experiencing her own. Ever since she arrived in New Orleans, she's been haunted by strangely familiar visitors—in dreams and on the streets of the French Quarter—who know more than they should. Unsure if she can rebuild her relationship with her mother, Cat is realizing she must confront her past, her future, and herself in the fight to try.