Enjoying a picnic Sarah Collins and her boyfriend are surprised by a gang of juvenile hunters. They rape her and kill him. She escapes and runs to her parents'house but is then shot in front of her father Mark, a wealthy Vietnam Vet. The boys finally wound him seriously and leave. A few months later, being healthy again, Mark manages to find the murderers and kills each of them. He also keeps on walking the streets at night, looking for criminals in action to execute until his wife Yvette convinces him to stop. However, he did not knew that he has been observed by the henchmen of Bill, an enigmatic businessman desiring to crush the local drug syndicate. He orders to kidnap Yvette and forces Mark to continue his work...