Revenge of the Ninja (1983)

After Cho's family was killed by a ninja, he decided to take his son Kane to the United States to start a new life. At the suggestion of his friend Brendan, he sold all his antiques and retired as a ninja. Unexpectedly, Brendan is a ninja who specializes in heroin smuggling in antiques. Cho realized that even in a "dream country" like the United States, there are many monsters with human faces and beast hearts, but to put an end to this evil behavior, only the ninja method can succeed.