In Yokosuka, 1986, Ryo Hazuki, the only legitimate heir of the Hazuki Dojo, spends his days training under his strict father Iwao; one day, he returns and witnesses a mysterious man called Lan Di attacking the Dojo.

The Hazuki family's maid Ine hands a letter to Ryo, who is restless from his father's death, and it contains characters he cannot read.

Ryo finally finds a person who can read Yuanda Zhu's letter, which says find Master Chen for help to learn about the man who murdered his father.

To chase Lan Di, Ryo decides to go to Hong Kong, but realises he does not have enough money to go; Ryo enters Mad Angels territory, seeking information on Lan Di.

Ryo is forced to fight Guizhang Chen from Chen Family, to save Nozomi, who has been taken hostage by the Mad Angels.

To unveil the truth behind his father's death, Ryo heads to Hong Kong to look for a person named Lishao Tao; Ryo wanders the city and meets Jainmin Tao, an old man practising Tai Chi, at a park and starts sparring with him.