The Great Yong dynasty is teetering on the brink of collapse. Imperial authority is fading, and the powerful Xiao clan, the emperor's in-laws, rules unchecked. Shen Qingyan, the least conspicuous legitimate daughter of the Marquis of Zhenbei's household, awakened memories of her past life as a court historian in childhood. She possesses the Records of Mountains and Rivers, and knows the secrets behind a century of rise and decline. Her family sees her as a pawn and plans to marry her off to a tyrannical prince. Outwardly, Shen Qingyan is mild and yielding; behind the scenes, she keeps her finger on the pulse of events, advancing one careful step at a time through the undercurrents of household intrigue. A sudden calamity quietly brings an opportunity to change her fate within reach. She has hidden her strength for over a decade, waiting for a chance to escape the game. With the realm on the verge of ruin, only the one who moves the pieces can carve out a glimpse of clarity.