Heroine: Wu Zhen.During the day, she is a noble lady who drinks flowers and drinks. At night, she is the leader of monsters who has everything to do. She occasionally transforms into a cat.

Male protagonist: Mei Zhuyu.On one side is the insignificant head of the Xuanjian Department, and on the other side is the Celestial Master Chang Xigong who has superb magic skills.​

Wu Zhen is a famous playboy in the capital. Although she is a woman, she has a large group of good friends.Although she is 26 years old, she is still unmarried.In the past few years, her family had urged her to get married, but in recent years they have gradually stopped urging her because Wu Zhen was so thick-skinned that she could ignore whatever others said.During the day, Wu Zhen lived a leisurely life, but at night, her real busyness began.She also has another identity, that of the cat master in the demon market.The Monster Market is a market for monsters. These monsters live in this urban area and their work and rest schedules are completely reversed from humans.Wu Zhen almost died when he was young, but was rescued by an expert at the cost of serving him and managing the demon market when he grew up.