Su Qinghan, the princess of the former dynasty, had been dormant for ten years and had unparalleled martial arts skills in medicine and poisoning. On the surface, she is a fairy doctor who helps the world and saves people, but secretly she is the master of Mo Yu Pavilion who is in charge of the world's intelligence. When she was setting up a dragnet to take revenge, she unexpectedly ran into the current prince He Linyuan. He investigates old cases from his past, and she plots a revenge plan. The two get deeper and deeper in mutual temptations.
