A dragon in the deep sea was taken as a hostage because his clan was not as powerful as his old enemy. Unexpectedly, I was rescued by a mysterious man on the road, who said some incomprehensible words and left. From then on, I met a strange girl in white. This girl had been appearing in the protagonist's dreams. She called the protagonist brother when she saw him. Slowly, the protagonist learns that he was originally a person from thousands of years ago. He died in a battle to defend the dignity of the Dark Night Royal Family, but was resurrected by a butterfly sacrifice of the Phoenix Clan. However, because the dragon soul attached to his sword completed a ritual for him that outsiders could not complete, he became a dragon. Since then, he has possessed the energy of the three ancient alien races, and has an ancient fusion power, the power of God. Moreover, I learned about a conspiracy of the Immortal Emperor and started practicing again...