Tessa Russo is the mother of two young children and the wife of a renowned pediatric surgeon. Despite her mother's warnings, Tessa gave up her own career to focus on her family - and from the outside, it seems as if she has the perfect life. Valerie Anderson is an attorney and single mother to six-year-old Charlie. Charlie has never known his father, and after too many disappointments, Valerie has given up on romance, believing it is safer that way. Although both women live in the same Boston suburb, the two have relatively little in common aside from a fierce love for their children. But one night, a tragic accident causes their lives to converge in ways no one could have imagined...