Dr. Irini Harringford was given away by her parents just before her fourth birthday. Although she has spent her whole life trying to convince herself she doesn't need them, Irini longs to understand why she was abandoned, while her parents kept her sister, Elle. So when Elle gets in touch with news that their mother has died, Irini reluctantly agrees to return to the family home. But she is ill at ease. She and Elle are not close. Irini knows only too well what Elle is capable of. Inexplicably drawn to her sister, yet terrified of the sway she holds, Irini tries to protect herself even as she is sucked back into her family's web of secrets and soon realizes that the past is more complicated than she imagined, and that her future rests upon discovering the truth about why she was really given away.