Mo Danxin, who had just celebrated her 20th birthday, was sent to South Korea by her parents. She was going to an art college in South Korea for cultural exchange. However, while asking for directions in Seoul, she accidentally got involved in a theft incident, which led to a cat-chasing-mouse fight. In the fighting scene, what is even more bizarre is that Mo Danxin was destined to travel to the period of King Chungding of Goryeo in 1348, and accidentally became a maid. After meeting Cui Ying and others, his life after time travel was more like a dream that he could not wake up from for a long time.