The struggle history of Erer, a magic stick. His cousin was forced to get married, but he was surprised to find in the medical school that his cousin who had been missing for many years had an almost identical appearance to him. After designing a series of strategies, he managed to exchange identities with his cousin who was living a hard life in the medical school. From then on, the two began to take different life trajectories. After exchanging identities with his cousin, he married a stunning beauty from Chang'an City. With a living environment of ample food and clothing, he bid farewell to the hard life of a doctor and embarked on a different journey in life.