Ning Fan transmigrates into the husband of the Female Emperor of the Tai Xuan Sacred Land. With no cultivation, he is looked down upon by everyone. He decides to quietly keep a low profile, unexpectedly awakening a sign-in system. By simply wandering around and checking in at various locations within the sacred land, he can obtain the Primordial Sword Body and peerless divine weapons. Knowing that the lower his profile, the greater the rewards, he happily stays out of trouble for three years. Until the Ancestor of Ten Thousand Demons leads a million monsters and demons in a bloody assault on the sacred land. The Female Emperor is exhausted and her sword is broken, leaving everyone in despair. Just then, a lazy voice suddenly comes from within the palace: 'Too noisy.' A flash of sword light erupts, instantly reducing the demons to ashes. The Female Emperor turns around in astonishment and sees that familiar figure dressed in white. Ning Fan sheathes his sword and smiles faintly: 'My lady, your husband is here.' The once-idle son-in-law has long since become invincible under heaven.