Liu Changxue, the legitimate daughter of the Grand Tutor, is ordered by imperial decree to marry Nangong Jue, the General Who Guards the North. Everyone laments this unfortunate match. After being wounded on the battlefield, the young general's mind has regressed to that of a small child, leaving him seemingly no different from an idiot. For her, this marriage is nothing less than stepping into a trap. But on their wedding night, Liu Changxue discovers something astonishing: she can hear every thought in her husband's heart. On the surface, he is a foolish husband who loves acting cute, eating, playing, and throwing little tantrums. In reality, however, he is the deeply calculating and patient master of the Shadowless Pavilion. His foolish demeanor is merely a disguise to avoid danger and protect himself. Meanwhile, dangerous undercurrents swirl through the imperial court. The emperor grows increasingly suspicious and suppresses the general, while the princes' factions eye him hungrily. The general's household is running out of money, its businesses are riddled with problems, and crises lurk everywhere.