Stand Still, Don't Move

When Tim Knight witnesses an armed bank robbery, during which an old lady is fatally injured, he becomes angry, but unable to do anything about it. He is at a low ebb, both physically and emotionally, but the event triggers his motivation for recovery and revenge. By pushing himself to the limits of his endurance and dealing with his own life issues, he comes back fighting. First tracking the criminals down, then by waging a war of attrition, he softens them up before finally bringing the full weight of the law down upon them.