BLUE MOON explores the fall of a soul into darkness as the result of the most painful of life's tragedies. Obsessed with avenging the unexplained death of his son, Boston prosecutor Jimmy McGowan stalks the cop killer ex-con who once threatened his life. Released from prison days before the boy's death, Mad Dog Redmond becomes Jimmy's prime suspect. Jimmy pursues Redmond desperately. And as the police grow suspicious of his behavior, the vengeful father plots a horrific payback that leads to the darkest of consequences.