retaliation of the Ninja is a 1983 soldierly arts-thriller movie about Cho and his son Kane who come up to United States to get down a new life after his household is kill in Japanese Islands by ninjas. He open a dolly store but is inadvertently import diacetylmorphine in the doll. When he find out that his friend has betray him, Cho must fix for the ultimate conflict he has of all time be involve in.