During the late Ming Dynasty, the crop circle phenomenon occurred due to the eclipse of the moon, which blessed the villagers of Taoyuan. They had mysterious powers to protect the people, and became a family of guardians as the centuries changed. The older "useless girl" Jiang Yiyi has broken up with her first boyfriend Chu Tianqi for two years. On the surface, she lives freely and freely, but her heart is still full of love. She accidentally met Fang Muye, an intern guardian, and the two became happy enemies when they shared a house. Fang Muye's wonderful ability not only added fun to life, but also changed Jiang Yiyi's appearance, helped her strive for the top in the workplace, and awakened her childhood dream of being an inventor. She was determined to develop a robotic arm to help the athlete Shi Liang who lost his arm return to the court. In order to make Jiang Yiyi's ex-boyfriend change his mind, Fang Muye saved the two from danger many times and rekindled their love. But he himself accidentally became the research subject of crazy scientist Chen Peter and was imprisoned. Jiang Yiyi also recognized true love in the process of gradually becoming independent. The two brought out the true meaning of happiness in their mutual protection and dedication.