My brother "Investing" and his younger brother "Electric Rabbit" grew up in an orphanage. They were adopted by the school worker "Thunder Sir" and received the help of "Lei Master" and stayed in the village boxing gym. The intensive support for the younger brother to go to school, but the electric rabbit made an underground punch to make money, was expelled from school, and the two brothers turned against each other.

The film is a spinoff of the original story and the two protagonists Wind and Cloud. The residents of Sword-Worshipping Manor, which houses the best sword-smiths in the world, are brutally massacred after they are alleged to be plotting a rebellion against the government. The young master of the manor, Ngou Kuet, is the only survivor. Ngou Kuet vows to finish forging the "Kuet" Sword, a task passed down by generations of his family which has yet to be completed. Ngou Kuet attacks Tin Ha Wui and battles with Wind and Cloud to obtain the blood of the Fire Kirin which can unleash the power of the sword. As the blood of the Fire Kirin runs in Wind's veins, he becomes Ngou Kuet's primary target.