The Yakuza of Japan has infiltrated the universities of Hong Kong and are conducting illegal activities such as underground bare knuckle fights,gambling and drugs. Hong Kong Police team up with the Japanese Secret Service to bring down the ruthless gang but their agents always seem to wind up dead. As a last resort they have a female detective (Sibelle Hu) infiltrate the organization in order to bring them down.
On a television show billed as “the greatest fight show on Earth,” eager amateurs with lots to prove boldly step into the ring and expect to leave bloody but victorious. The ratings hungry producers seek out “legendary” but largely forgotten streetfighters and mine their desperation for recaptured glory and redemption into ratings gold.
Kang-cho is Master Won-kak's best disciple. In order to become the 'Chun-ha-jang-moon (head),' Kang-cho murders his teacher Jo Sul and then seizes the secret manuscripts of the Nwoi Fighting Technique. Won-kak expels Kang-cho and becomes the Chunha Jang-mun. In order to lead Kang-cho to a new life, Won-kak divides the secret manuscripts of the Nwoi Fighting Technique into four and hides it in the north, south, east, and west regions. A few years later, Wang-ryong, the head of the north region, unifies the other regions underneath him. Wang-ryong becomes the head of the north, south, east and west regions but he dreams of becoming the Chun-ha Jang-mun. However, Keum Sa-bo challenges Wang-ryong to a fight. Wang-ryong barely escapes with his life. After many ups and downs, Wang-ryong becomes the Chun-ha Jang-mun but he gives the position up. Instead, Wang-ryong finishes the Buddhist statue Won-kak had started.
Baek-ho goes to Korea to find his older brother Chung-ryong to continue the lineage of the School of the Jung-mu fighting technique that is being destroyed by the Japanese. Meanwhile, Saburo, the high priest of Yamano Musado, comes from Japan to avenge the death of his brother, Murakami, who died at the hands of Chung-ryong, a master of the School of Jung-mu. In the end, Pak Shi-baek and Baek-ho destroy Saburo's gang.