The proud and clever heiress of the Shen family, paired with the eldest son of the Gu family, a playboy on the surface but a man of deep thoughts underneath. Matched in wits and united in strength, they go from testing each other to entrusting their lives to one another amid a crisis. Gu Jinchuan's repeated, affectionate yet provocative nickname for her, "Little Zhizhi," is both sugar and a knife.