It was supposed to be happily ever after for Emma and Adam. Emma thought it was all behind them. No more guns, no more fights, and no more espionage. But when Rat and Roach are abducted, and their own government turns against them, Adam and Sentry 6 are the only options left. Adam and Emma join Sentry 6 to face a new adversary, and solve the mystery of a ring and its destructive technological abilities. It is unclear if their relationship is an asset or a liability. As the danger builds, their differences threaten to tear them apart. Can Emma survive in Adam's world? Can Adam face the demons of his past? Is there a place for their love in the soldier's heart, or will it only leave them vulnerable to attack? Enter the world of Sentry 6 once more in this thrilling sequel to Nightwatch.