Blue-eyed kunoichi (female ninja) assassin Hiriji (Saori Hara) clashes with a cunning thief while attempting to steal the scroll of immortality from a Christian feudal lord, and falls for Christian warrior Seitaro (Mutsuo Yoshioka) after he saves her from certain death. Later, a high ranking Buddhist declares Christianity heretical, and vows to kill Hiriji and Seitaro by whatever means necessary.