铁中棠为大旗门掌舵人云翼的义子，大旗门仇人司徒笑追杀铁及云次子铮(罗莽 饰)，意图探索大旗门秘密宝藏之下落。铁得知必须往长春岛见「日后」，便知大旗门之一切。铁赴长春岛，发现「日后」已死，但却碰见夜帝铁毅——大旗门之始创人，而铁则为其亲生儿子……

Two young lovers, Yun Keng and Ching Shuang belong to opposing clans. Their relationship is a secret for a time. Once Master Diao, head of the Great Banner Clan, learns of this treachery he must execute his son by way of quartering. Ti Zhong Tang as well as Yun's hot headed brother, Yun Zheng try and coax the old man out of having his son put to death but to no avail. Just before the act is carried out, Ti knocks Yun Keng unconscious and he is willingly replaced by one of his brothers who is quickly killed. Master Diao and Ti swear to reveal the truth to no one. Ti vows to locate the whereabouts of the beautiful Ching Shuang so the two can be reunited in the hopes that their love will one day rebuild the Great Banner Clan.