Maggie takes care of her 4-year-old grandson Zack after he was abandoned by his mother, Corinne, three years earlier. Corinne resurfaces and wants the little boy back. Maggie is relieved to have her daughter back, but doubts that she is fit to take care of Zack. Corinne seems to have sorted out her problematic past: she is now sober and separated from Joey, her toxic ex-partner. Can it last? Their lives will be turned upside down.