Mona Gray is a 20-year-old loner who, as a child, turned to math for salvation after her father became ill. As an adult, Mona now teaches the subject and must help her students through their own crises.

Woodstock teen, Rosie, mourning the first anniversary of her younger sister's death discovers the mysterious man who sexploited and bullied her sister to commit suicide is back on-line trolling for new victims. After the authorities refuse to get involved she finds a darkness she never knew she had when she takes justice into her own hands.

Strangers in a waiting room become the characters in Claire's recounting of her troubled life and the secrets of a turbulant marriage.