John Peter Macallister, was a Korean veteran who after serving, decided to live in Japan, and while there, he studied Ninjitsu and became a Ninja. 30 years later he learned that he has a daughter, so left, to find her. But apparently, he can't leave the sect that he is with, cause it means that he is now marked for death. He manages to escape and upon arriving in the States, he meets Max Keller, a drifter who has a penchant for getting involved with other people's problems and helping them out if he can. Max and Macallister hook up with Max helping him find his daughter, and Macallister teaching him the ways of the ninja. At the same evading Okasa, one of Macallister's students who is now sworn to kill him.
Two episodes of "The Master" pasted together. In the first half, Max Keller meets John Peter McAlister, an American who remained in Japan after the war and became a Ninja. He has returned to America to locate his newly-discovered daughter, and agrees to tutor Max in becoming a Ninja as well. During this, they help a father and daughter fend off an unscrupulous land developer who is trying to get hold of their airport. In the second half, Keller and McAlister aid a nightclub owner and his daughter in fending off members of the Asian Mafia, who are trying to take over their club. During all this, McAlister is pursued by an enemy Ninja, who wishes to kill him for breaking oath and leaving Japan.