Oboro, a naive, love-struck girl, is pledged to Gennosuke, an idealist. Both are successors to opposing ninja clans with a long history of hatred kept barely in check by a covenant of peace. Just as the two vow to reconcile the clans with their marriage, the shogun orders the feud to resume in order to resolve an internal struggle that threatens to tear the Tokugawa shogunate apart. Even worse, Oboro and Gennosuke themselves are forced to lead their clans in battle. Can the star-crossed lovers resist the brutal circumstances and remain true to their love as the death toll rises?