A Mu astrologer took two young apprentices to the continent of Eden to form an alliance with the goddess Athena. On the way, a bull went crazy and the two teenagers rescued them. One of these two people is a Tianlong and the other is a Pegasus. Their deep friendship has been destined since the mythical era. Pegasus's sister died unexpectedly. In order to save her sister, Pegasus decided to ask Hades for help, no matter what the price, he would resurrect her...