Fake County Commandant, Real Princess

Jiang Tang, daughter of a county magistrate, disguises herself as a man to investigate cases for her father. For three years, she solves one baffling case after another, yet no one knows that the "Iron-Faced Junior Minister" is actually a woman. Then a mysterious prince surnamed Si arrives in disguise and sees through her at a glance. He doesn't expose her. Instead, he invites her to the capital to solve a series of linked mysteries with him. Beside each body, someone has left a white magnolia, the same kind as the keepsake her mother left behind. What is he really after?