Roxanne Callahan has always been her younger sister's caretaker. Now married, her happiness is threatened when beautiful and emotionally unstable Simone, suffering from crippling postpartum depression, commits an unforgivable crime for which Roxanne comes to believe she is partially responsible. In the glare of national media attention brought on her sister, Roxanne fights to hold her marriage together as she is drawn back into the pain of her troubled past and relives the fraught relationship she and Simone shared with their narcissistic mother.

At the same time, only she can help Simone's nine year old daughter, Merell, make sense of the family's tragedy. Cathartic, lyrical, and unflinchingly honest, The Good Sister is a novel of four generations of women struggling to overcome a legacy of violence, lies and secrecy, ultimately finding strength and courage in their love for each other.