A mother and son, who were forced to kill by the king who was fighting for the throne, survived by chance and lived a normal life until Lin Mu met Shen Zhilin, the guardian. Then a gold coin triggered memories of the tragedy twenty years ago. On the other hand, his son Lin Mu, with the help of Shen Zhilin, began to search for the truth and memories. The two fell in love in the process, but while searching for the truth, they frequently approached the royal family. The eldest prince fell in love with Lin Mu, so Lin Mu, Shen Zhilin and the eldest prince fell into a struggle. When the other princes knew the truth in advance, they thought Lin Mu was here to compete for the throne, so they started killing him. In the process, his mother was unfortunately killed, and the sad Lin Mu decided not to give up until the last moment. Lin Mu finally found out the truth step by step, and found that he was a prince, and the eldest prince who loved him was his biological brother. Lin Mu fell into a psychological conflict. What would he choose in the end?