Christmas Eve. During a street brawl, a random bullet deprives a happy family of their little son, and a father, pursued by bandits, loses his voice. Leaving the hospital, the man finds a new meaning in life—a heightened training regimen to become a formidable opponent in a firefight, a chase, or close-quarters combat. On the anniversary of the tragedy, he intends to unleash a non-stop symphony of vengeance.