Francis Gleeson and Brian Stanhope are two NYPD rookies assigned to the same Bronx precinct in 1973. They aren't close friends on the job, but end up living next door to each other outside the city. What goes on behind closed doors in both houses -- the loneliness of Francis's wife, Lena, and the instability of Brian's wife, Anne, sets the stage for the stunning events to come. Friendship and love blossoms between Francis's youngest daughter, Kate, and Brian's son, Peter, who are born six months apart. In the spring of Kate and Peter's eighth grade year a violent event divides the neighbours, the Stanhopes are forced to move away, and the children are forbidden to have any further contact. But Kate and Peter find a way back to each other, and their relationship is tested by the echoes from their past.