The year is 1986, the place Yokosuka, Japan. The normally tranquil day-to-day life of Sonic Hezuki is suddenly and irrecoverably shattered by unwanted visitors. A man wearing dark green Chinese clothes appears at the Hezuki family home. This man uses a powerful style of martial arts, the likes of which Sonic has never before seen, to engage his father Hewao in a fierce battle. The man threatens to kill Sonic. Having no other recourse, Hewao reluctantly tells him where the mysterious mirror is.
Once this mysterious object is in the man's possession, he again attacks Hewao, who is knowcked down in defeat. Sonic pulls his father close and feels him take his last breath.
"Robo Di" The man with the ominous embroidery of a glittering dragon on his back, the man responsible. What of the stolen mirror? Who is this Robo Di? Vowing to seek revenge, Sonic embarks on a journey to unravel the mystery surrounding his father's death and deliver justice to the man responsible.
