Shen Chuyi, daughter of a disgraced official, saves Pei Zhao who is wrongfully exiled to the frontier, cures his leg injury, gives him silver and money, and helps the Pei family get through hardships. A year later, Pei Zhao is rehabilitated and returns to the capital, sending only a cheap wooden hairpin telling her to use the hairpin to enter the capital to collect a reward. As soon as she enters the capital, she is framed and imprisoned, and is shocked to find that her close friend Song Yu has impersonated her identity, become the crown princess-to-be, and even wants to put her to death. Shen Chuyi teams up with the grand princess to break the situation, little knowing that Pei Zhao has long seen through the truth and is playing along to set up a grand scheme. On the wedding day, a shocking reversal occurs, the fake princess loses her life, and she ascends to the East Palace carrying a sea of blood feuds to clear her father's name.