Jiang Yu accidentally arrives in modern times, becoming the Jiang family heiress caught in a family recognition turmoil. Before she has even adapted to her new life, she encounters Shen Ji, who looks identical to her former lover, yet he does not remember her. Facing ongoing misunderstandings and family difficulties, she joins hands with her elder sister Jiang Mingyue, and also grows close to Shen Ji again amidst a continuous series of amusing interactions. As old acquaintances appear one after another, lost memories quietly awaken, and the two continue their destined romance through understanding and companionship, jointly guarding hard-won happiness.