Year 725 of the Xuan Calendar
The emperor of the Xuan Kingdom has lost much of his power. To seize power and restore his country, Han Yu, a prince of the Xuan Kingdom, resolutely joins the Fire Element Sect and becomes the disciple of Chu Qingyun, who is only three years older than him.
As time passes, Han Yu gradually falls in love with his cool and powerful master. His junior sister, Yun Qingwu, leaves in a fit of jealousy.
Later, Han Yu's love for his master is exposed, and he is imprisoned. After his friends rescue him, he flees the Fire Element Sect and returns to the imperial palace. He ascends the throne as emperor, and then...