During the Republic of China, a female spy time-traveled into Fan Erjie, who came to the city to work as a housekeeper, and accidentally saved Leng Er, an international killer organization who wanted to leave the organization but was hunted down by the organization. The two second-hand housekeeping companies have become the tertiary industry of the Quick Time Travel Bureau, and they are responsible for patching people who have traveled through various eras, commonly known as wiping their butts. Most of the time, the two of them go on missions together. The relationship is about two people getting together first, and then falling in love slowly. For the killer, sex is only a need, and they go on many missions together to save each other. She developed feelings, finally completed the mission of the Fast Travel Bureau, and returned to the Fast Travel Bureau to serve as an official for retirement.
