The Black Ninja Empire want a "confidential blueprint" in the possession of Vietnam vet Robin and will stop at nothing to get it. When Robin's fiancée is murdered, her sister joins the White Ninja Empire and teams up with Robin to wreak bloody vengeance.

The Black Ninja Empire want a "confidential blueprint" in the possession of Vietnam vet Robin and will stop at nothing to get it. When Robin's fiancée is murdered, her sister joins the White Ninja Empire and teams up with Robin to wreak bloody vengeance.