Lin Huanhuan and Lin Shangshang are twins. The younger sister Huanhuan was sent to the mountains to learn medical skills when she was a child. Many years later, her sister Shang Shang fell in love with the prince. Unexpectedly, the queen deliberately married Shang Shang to the prince Shangguan Li. Lin Shang Shang committed suicide by hanging for this reason. Lin Huanhuan was forced to marry on her sister's behalf, starting a cohabitation life where enemies met on a narrow road!