Lin Wan thought she had met true love until she found out that her husband Lu Jingshen only married her because she looked like his lost "sister" Su Qing. For three years, she has lived in the shadow of others, and even the joy of pregnancy was shattered by the word "abort". Su Qing's sudden return reveals an even bigger mystery. Not only was she someone Lu Jingshen had cared about for many years, but she also had a mysterious blood connection with Lin Wan. A fake pregnancy test form and a well-planned scam made Lin Wan leave heartbroken. When Lu Jingshen kneels in the rain and searches frantically, when the secrets of blood are revealed layer by layer, when everyone is caught up in this substitute game - it turns out that the deepest love is often hidden in the most painful lies.
