At thirteen, investigative prodigy Huang Zixia had already proved herself by aiding her father in solving confounding crimes. At seventeen, she’s on the run, accused of murdering her family to escape an arranged marriage. Driven by a single-minded pursuit, she must use her skills to unmask the real killer…and clear her name. But when Huang Zixia seeks the help of Li Shubai, the Prince of Kui, her life and freedom are bargained: agree to go undercover as his eunuch to stop a serial killer and to undo a curse that threatens to destroy the Prince’s life. Huang Zixia’s skills are soon tested when Li Shubai’s betrothed vanishes. With a distinctively exquisite golden hairpin as her only clue, Huang Zixia investigates—and discovers that she isn’t the only one in the guarded kingdom with a dangerous secret.

Heroine Ning Yi one's background is slightly cold, however from beginning to end positive enterprising, from compose poem, from business, to learn martial arts, Qi, from the initial ease to spend the tauntuse, gradually assume more responsibility, help Su Tan son to start a business together, the friends and relatives who help the side again realized respective ideal, aid people hardship, grant a person to fish. After the face of domestic affairs, Ning Yi and a group of people repeatedly in danger, but ultimately rely on courage and wisdom to protect the city of Lin An. Just as the saying goes, "a small verbous husband is a big world", Ning Yi has grown from a verbous husband who just wants to do things by himself to a person with a real mind for the world. The other characters also have their own growth, and finally contribute their own strength to the big situation.

Childhood, upbringing, family background, social relations, traumatic experiences… We keep reviewing and seeking out the motives of criminals, exploring the subtlest emotions driving them. It’s not to put ourselves in their shoes and sympathize, or even forgive them; it’s not to find some reasons to exculpate their crimes; it’s not to kneel down before the so-called “complexity of human nature”; nor to introspect social conflicts, much less to alienate ourselves into monsters. We just want to have a fair trial – for ourselves and for those who still have hope for the world.

Xiao Qiao, a clever girl from the Qiao family, marries Wei Shao, the brave and kind master of the Wei family. Despite initial wariness due to ancestral grievances, Xiao Qiao and Wei Shao navigate their relationship with humor and determination. As they face challenges together, they come to appreciate each other's qualities through their warm daily life, intertwined with family and national affairs, and work to restore peace and resolve conflicts.

Set in the Shanghai Bund in the 1940s, it revolves around a female detective who solve multiple cases.