Modern woman Su Jingyao transmigrates into a book overnight, becoming the Crown Prince's concubine destined to meet a gloomy end in the original work. Knowing the plot well, she is determined to defy the heavens and change her fate. After marrying into the Eastern Palace by imperial decree, she faces Crown Prince Jun Zechen, who is devoted to Crown Prince Consort Ling Yue and steadfast in his promises. Su Jingyao hides her sharpness, using gentleness and sensibility as a disguise, maneuvering through various factions in the Eastern Palace, plotting step by step, and winning hearts to contend for favor. Through repeated confrontations and interactions, Jun Zechen gradually changes his view of her, falls for her, and develops feelings. Step by step, she plans, stirs up the turmoil of the inner palace, rewrites the cannon fodder's destiny, and vows to hold power and life firmly in her own hands.