Xie Yunshu, the legitimate daughter of the Prince of Zhenbei, was framed by others in her past life, her family fell unjustly into ruin, and she herself died with bitter hatred. Reborn back to the age of fifteen, she resolved to rewrite her destiny, taking the initiative to reach an engagement with the Seventh Prince, who had long held a reputation of being sickly and frail. In front of people, the two of them—one gentle and poised, the other sickly and aloof—deceived the gazes of the entire court; behind the scenes, they joined forces to investigate corruption and punish bribery, pacify the borders, re-examine old cases, and unearth the mastermind behind the framing of the loyal and upright. From a contractual marriage to mutual understanding, the two ultimately joined hands to firmly secure the realm and usher in a peaceful and prosperous era.