The original Qingcheng couple, husband Lancheng and wife Lin Qing, had a son and a daughter, the boy Lanxiao and the girl Lanling, which means "After Qingcheng, Lingxiao will definitely come.". As everyone knows, eighteen years ago, the girl was exchanged on the day she was born. While the family was still immersed in the joy of having a daughter, Lan Cheng died unexpectedly and the "daughter" was missing. Fortunately, Lan Ling was moved to a small fishing village and grew up in a family named An, and had a very happy childhood. The elder brother of the An family, An Xu, has the melancholy face of the male protagonist of an idol drama, but he has a playful personality. The "brother and sister" fell in love and killed each other while fighting each other. But fate always likes to play tricks on the little girl Lan Ling. When the 178cm tall girl was about to turn eighteen, she returned to her original family due to a car accident, but lost her memory. Will she stay? Or will he return to his happy Anjia? Will we see our happy enemy An Xu again?