Phoebe is drawn to Mallory, the strange and secretive new girl at school. Soon the two become as close as sisters . . . until Mallory’s magnetic older brother, Ryland, arrives. Ryland has an immediate hold on Phoebe — but it turns into something dangerous, as she begins to question her feelings about her best friend and, worse, about herself. Soon Phoebe discovers the shocking, fantastical truth about Ryland and Mallory, and about an age-old debt she’s meant to pay. Will she be strong enough to save herself from the curse?