Ye Xuan, the Dragon Lord of Great Xia, quells the northern rebellion and returns to the country in low profile to repay kindness and seek revenge. However, his status-climbing fiancée, Xuanyuan Yan'er, looks down on him and mistreats him, desperate to break off their engagement and marry the city guard's son, Lei Bao. Her mother, Shen Wanqiu, disapproves. When Ye Xuan discovers Lei Bao is the son of his enemy, Lei Hu, he beats him and orders him to deliver a message: Ye Xuan is coming for revenge. Shen Wanqiu worries for Ye Xuan, unaware he is already the Dragon Lord of Great Xia. After multiple incidents, everyone realizes the man they once despised truly is the Dragon Lord.