Su Junlan and Pei Jingxuan were childhood sweethearts, growing up together as a pair destined for a lifetime of happiness after marriage. Who could have known that after their wedding, Pei Jingxuan would'd have a change of heart, ultimately driving Su Junlan to die of grief. Opening her eyes once more, she returned to the very day of her wedding to Pei Jingxuan. The marriage was bestowed by the Son of Heaven and could not be altered; if she was fated to be a Pei family wife and avoid repeating the tragedies of her past life, Su Junlan was firmly resolved not to marry Pei Jingxuan. Right in the street, she demanded the groom be swapped, pointing a casual finger to give herself to Pei Jingxuan's ninth uncle—that renowned Marquis of Yan guarding Mobei, decorated with great military achievements, who remained unwed due to his reputation for bringing misfortune to his wives: Pei Xun.