As the prince of Emperor Qianlong of the Qing Dynasty, Yongxuan was crippled at birth. With serious defects since childhood, he was destined to miss the throne. After experiencing the death of Prince Rong Yongqi, the fourth elder brother Yongxun being demoted to guard the imperial mausoleum, and the assassination of the twelfth elder brother Yongxuan, Yongxuan is being pushed step by step by the person he loves most into the abyss of seeking to usurp the throne and is beyond redemption.