Over a decade ago, Kana fought against evil as the heroic White Mask. Now 34 years old, she retired from her life as a heroine upon marriage and has been enjoying a peaceful family life with her husband. But suddenly, dark clouds loom over her happiness. Her husband, who had always dedicated himself to peace, mysteriously disappears. To find him, Kana dons the White Mask once more, returning to battle after years of inactivity. Her search leads her to a mysterious religious cult. Posing as a follower to gather information, she is ultimately exposed by the cult's leader, Kuwaki.