Yue Lei, the rebellious second son of Yue Fei, set out on a path of revenge after the deaths of his father and brother. Though his attempt to assassinate Qin Hui failed, with the help of allies, he sought evidence of Qin Hui's treason. As Yue Lei journeyed through the imperial city and witnessed the struggles of the people, he transformed. Amid the political turmoil of the Southern Song Dynasty, Yue Lei eventually took on the mantle of his father as the protector of the country.