New York City, 1973 and the city is falling apart under the weight of crime and degradation. Al loves Trudy but doesn't understand her or how to be a man in this world. He hopes that angry Mike, a courageous and selfless father to a mentally crippled son, can enlighten and inspire him. But Mike, who spends his nights manning a spotlight outside Broadway theaters, has a dark side. He can keep those beams licking the dark heavens and he can fix any broken appliance you hand him, but he can't fix his broken son and it is killing him. The two men forge a friendship and try to work out their frustrations, paranoia, and rage as they grope for some standing in a city buried in uncollected garbage and uncontrolled vermin. Meanwhile, Mike's wife, Arlene, a classically trained actress, becomes a New York City folk hero portraying a distraught housewife in a television commercial trying to battle an onslaught of cockroaches. With passion, authenticity, and insight," along with wild humor and relentless humanity, Light Man digs into the psyche of a city on the edge and two men whose lopsided versions of heroism take them to the brink of catastrophe and their own contorted versions of redemption.