The secret Red Lotus Flower Society is committed to the overthrow of the evil Manchu Emperor and his minions. One of his Governors is sent on a mission to retrieve a list of members of that secret society. Meanwhile, Canton kung fu practitioner Fong Sai-Yuk falls in love with the beautiful daughter of a rich merchant.

The hero Fong Sai Yuk becomes involved in the secret brotherhood "The Red Flower", who are trying to overthrow the Manchurian emperor and re-establishing the Ming dynasty. The social upheaval is combined with Sai Yuk's personal moral conflict about how to conform to the rigid regime of the brotherhood and on top of that sort out his difficult love life, saddled with two presumptive wives.