It tells the story of Wen Dingyi, the daughter of a high-ranking official, who suffered the destruction of her family and disguised herself as a man to become the apprentice of an executioner. As a result, she happened to meet the twelfth brother of the current emperor, Yuwen Hongce. The two teamed up to explore the truth and encountered various funny accidents. From then on, they followed each other and started a warm, interesting and crisis-ridden journey in the world.