Many years ago, YUNG CHING exchanges his baby girl with KUNG’s baby boy. This boy is LUNG. Since LUNG is not accustomed to other nursing mother’s milk, HUNG’s mother was invited to the palace to give milk to LUNG. HUNG’s mother realized that she had known a great secret of the imperial family. In order to protect her family, she collects a little footprint from LUNG as an evidence for future use. In order to ensure that HUNG’s mother will keep this secret, KUNG helps to protect HUNG from punishments all the time even if he had done a lot of sinful things. SING finally finds a way to save YEE and CHING. He also helps HUNG’s mother to realize that she is the one who should take full responsibility of his death. HUNG’s mother is struck by this and becomes mad. No one believes a word from her since then. CHING and YEE are released and everybody is overjoyed. LUNG requests SING and CHING to return to the palace……