A piece of blood-stained farewell book ruined Xie Mingli's first heartfelt love in her life.
She didn't know that the person she loved, "Shen Yan", who left this "wrong letter" and disappeared without a trace, was no longer the upstart minister.
He is Yan Lin, a Jianghu guest who killed someone to protect himself on a rainy night and was forced to take on the identity of others. Under the guise of changing the day and night, there is a day and night conflict between the chivalrous heart and the lie of survival. That hastily written letter was his unspeakable pain and the beginning of a strange combination of circumstances.
As the daughter of an official, Xie Mingli is smart and rebellious, but in the end she cannot break free from the shackles of ethics and her father's destiny. In desperation, she was forced to marry the fourth prince Xiao Jinghuan, who often walked around the market as "Qi Gongzi". He is as gentle as jade and cares about the world. Besides the prince, he is the most promising prince to succeed to the throne. A marriage that began with responsibility and compromise quietly gave rise to unexpected emotions amid the warmth that comes day and night and the shelter in times of crisis.
The mystery of identity follows him like a shadow, and the intrigues of the court are treacherous. When the secrets Yan Lin carries lead to a fatal threat, when Xiao Jinghuan understands the truth under the skin of "Master Shen", when the "wrong brocade book" of the past leads to today's wrong marriage... The fate of the three people collides fiercely in the power struggle and emotional entanglement.
Should he stick to chivalry or sink into the abyss? Should we surrender to fate or hold on to new life? When the dust settled, in the Nuan Pavilion of the palace, Xie Mingli held a child in her arms, and beside her was Xiao Jinghuan, who had become the prince. The deep love and pain in the past finally turned into a sigh; and in the night rain in the rivers and lakes, a lonely figure continued the unfinished road of chivalry, spending the rest of his life to atone for the "mistake" of identity that began with helplessness.
