1986年、横須賀。芭月道場の一人息子である芭月涼は、厳格な父・巌の元で日々武術の腕を磨いている。その日、涼が帰宅すると、道場が謎の男・藍帝に襲われていた。巌にとある『鏡』の在処を聞き出そうとする藍帝。その圧倒的な強さに涼は太刀打ちできず、目の前で巌が殺されてしまう……。

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. Lan Di demands Iwao to tell him where "the mirror" is. Ryo attempts to fight against Lan Di; however, he is easily defeated and watches Lan Di murder his Father before his eyes...