Xie Changfeng, a resourceful strategist from a poor family, was involved in the court turmoil due to an unresolved case and unexpectedly became the retainer of the second princess Xia Yunshu. The second princess looks cute and willful on the surface, but in fact she has the world at heart and secretly investigates a conspiracy that threatens the foundation of the dynasty. From using each other to knowing each other and falling in love, the two work together to solve the mystery in the crisis-ridden imperial city.
