Lin Wan, a modern social worker, accidentally traveled into the world of "Ode to Joy" and became the owner of Room 2204, a new neighbor on the 22nd floor of "Ode to Joy". With the foreknowledge of the plot, she broke into the lives of the five girls, witnessed and participated in Fan Shengmei's family dilemma, Qiu Yingying's love twists and turns, Guan Ju'er's confusion in the workplace, Andy's life shackles and Qu Xiaoxiao's growth and transformation. In the day and night with the girls on the 22nd floor, Lin Wan gradually became a close friend who supported each other from a bystander. She used modern thinking to solve their problems and found her own self-worth in the process. Together with this group of lively girls, in the fireworks world of Shanghai, she wrote a new chapter of joy about friendship, growth and warmth.
