Xu Nian is betrayed by her childhood sweetheart of four years. Drunk, she stumbles into Chi Lie’s room, her best friend’s adoptive father, and they spend the night together. Chi Lie presses forward, insisting on taking responsibility. Torn between guilt and affection, Xu Nian struggles. When her ex pesters her and she faces workplace troubles, Chi Lie stands firmly by her side. Eventually, Xu Nian lets go of her worries and accepts this deep love across age and status. They get a happy ending.