Forty-one-year-old Norah Mulcahaney's star is on the rise. Not only has she passed the rigorous NYPD captain's exam, thus achieving a long-held career goal, but she's also succeeded in adopting a baby boy, whose presence fills her with a joy she never could have imagined. But her happiness is shattered when, within a month's time, four fellow officers die, apparent suicides. When Chief James Felix, Norah's longtime friend and mentor, asks her to pay a visit to one of the grieving widows, she is immersed in a controversial case that hits much too close to home. To complicate matters, Norah faces every working mother's nightmare when her nanny suddenly leaves, forcing her into a child-care crisis. When her superior refuses to approve her makeshift home office, Norah enlists the help of Chief Felix - until her beloved friend very nearly becomes the fifth policeman to die. Spurred by the personal turn the case has taken, Norah must prove the deaths were murders, not suicides.