Au-Yeung Wai-Lan, owner of a martial arts training school, is reunited with her long-lost son Koo Yu-Cheung after years of agonizing separation. On his return home, Yu-Cheung is shocked to find that his younger brother Koo Yu-Tong has been critically ill and that his father was murdered long ago by Wing Tak, the existing director of a pharmaceutical company and a bitter old foe of the Koos. Yu-Cheung has never been into kung-fu but shows glimpses of his potential when he strikes back at the impudent, arrogant Wing Man-Kwan, also the son of Wing Tak. Pinning all her hopes on Yu-Cheung, Wai-Lan not only teaches him a special set of kung-fu skills created by the family, but also registers for him for the Seven States Martial Arts Championship Tournament. Out of the blue, Yu-Cheung’s opponent in the final turns out to be Wing Man-Kwan.
Yu-Cheung and Wing Man-Kwan were both exhausted by fighting each other in the final, both wanting to win so badly. Eventually, Yu-Cheung’s master told Yu-Cheung to lose the battle, not wanting him to die or to kill.
After the tournament, Yu-Cheung and his family found evidence to prove to everyone that Wing Tak is guilty. Wing Tak began to use cruel ways again to save himself. He even kidnapped Ying Ngan-Ming. Will he succeed in fooling everyone again?