Lin Sa, a single mother, gave birth to her child after a one-night stand five years prior. She and her son have relied on each other, working hard to make ends meet. Unbeknownst to Lin Sa, the father of her child is actually Gu Shen, the president of Gu Group. Gu Shen had been searching for Lin Sa for five long years. Meanwhile, Lin Sa's best friend Zhang Ting accidentally ran into Gu Shen and introduced him to her son as her own, replacing Lin Sa's identity altogether.