On the night when the real daughter He Yan was brought back to a wealthy family, the fake daughter He Yiyi plotted against him and intercepted the prince of Beijing who was seeking medical treatment to make an antidote. Bo Siheng was born with a cold and had only three months to live. The He family and the Bo family had a marriage contract, but the He family was reluctant to give up their adopted daughter to marry a sick man, so they forced He Yan to marry him instead. He Yan's medicine king master suddenly disappeared. In order to find the master, He Yan decided to marry into the Bo family and rely on the power of the Bo family to find the master. Unexpectedly, Bao Siheng was the man who gave her the antidote that night.
