Mountain herb-gathering maiden Su Nianqing risks death to warn about a mountain landslide and saves the Gu Corporation chairman and his daughter; a crescent moon birthmark on the back of her neck exposes the clues to her birth. It turns out that twenty years ago, clinic nurse Qin Yulan secretly swapped infants, and she is the real daughter of the Gu family left out in the cold. Entering the Gu Corporation's pharmacy to make a living, Su Nianqing encounters frame-ups and sabotage one after another. The fake daughter Gu Mingyue suffers a mental imbalance and is bewitched by unscrupulous businessmen, bringing a crisis to the enterprise. Holding the ancient herbal formula left by her mother, Su Nianqing wants to uncover the truth of the infant-swapping back then and break free from the shackles of fate. Can she hold on to her original intentions and live out a life that belongs to herself?