Xia Fan, who was reincarnated as the son of the prince of Qian Kingdom, was jealous of the emperor because of a vision that fell from the sky when he was born. After his parents passed away, Xia Fan inherited the prince's title and became a useless prince in Qian capital who could only read Buddhist scriptures and Taoism. Fortunately, Xia Fan was born with the companion system, and could learn various martial arts, immortality, and magical powers from Buddhist scriptures and Taoist books. In this world where martial arts reigned supreme, dynasties arose, demons rose, and there was no immortality. Xia Fan originally just wanted to guard his only sister, Tatsumi. Live your life in a down-to-earth manner. However, my sister is too good, and trouble always comes to my door. Xia Fan, who couldn't bear it, broke out completely. He walked on a mountain of corpses and a sea of ​​blood.