In order to protect the mother and sister, 7 year old Cesare chooses to follow his father Long Borgia, the Pope of Messiah, to Florence, and joins the cruel robotic army. With his special genetic traits of owning purple eyes, he becomes a knight driving the robot, “the Flaming Angel”. Through this extraordinary journey, Cesare also starts to realizing what is his own truth in the life.

A boy with long and black hair and a pair of fierce eyes like dragon appeared in the mecha battle. He was fearless, alert and calm but above all, he was as mysterious as a dark abyss. Facing the so-called “Dragon Slaughter” mecha, this mysterious boy had beaten down his rival completely and won without showing much emotion. What was his story and would the owner of Dragon Slaughter revenge on him?