Francis Gleeson and Brian Stanhope, two New York cops, live next door to each other outside the city in the 1970s. What happens 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 explosive events to come. When their children, Kate and Peter, form an immediate attachment, so too does a violent event divide the families and the Stanhopes are forced to move away. The children reconnect as adults and, as they fall in love, are forced to reckon with their shared past.