While experiencing flashbacks from his time in Iraq, Officer Mike Banner responds to a domestic violence call in a bad neighborhood. He arrives, tension mounts, and the drunk, rage-fueled man (Constantine) charges Banner. Shots are fired. Constantine is down. Banner uses his training as an army medic to help stabilize the wounds and enlists the help of his terrified son, Elijah. But it’s quickly clear that Constantine won’t survive for long. Banner -- moved by the realization that Constantine is a fellow veteran -- takes matters into his own hands.