During the Chenghua period of the Ming Dynasty, Gu Panpan, a poor lady from a poor family, relied on her outstanding knowledge and "innocent heart" to work as a female teacher (female teacher) at the border guard station where the situation was complicated. She looks at the cruel world from a fairy tale-like optimistic perspective. She does not rely on golden fingers, but only relies on her excellent affinity and the wisdom to simplify the complex, and teaches a group of dandy disciples like a demon king to become talents. In the process, she had a wonderful intersection with Lu Jue, a cold-hearted young general who was ordered to guard the border. From his initial suspicion and surveillance, Lu Jue was gradually moved by Gu Panpan's healing power of "living life like a children's book". The two worked together to solve the border crisis, and finally maintained a pure land of innocence in the border town of the Ming Dynasty.