The story tells the story of the heroine Zhang Ya Nan, once a student at the police training school. Due to health issues, she had to abandon her training and later married a police officer. Together, they had a son named Xiao Qian. Tragically, after several years of marriage, Ya Nan’s husband passed away suddenly. Forced to support her family, Ya Nan had to work as a cleaning staff member handling special cases at Sunshine Cleaning Company. Unexpectedly, this job brings her into contact with a group of colleagues, leading to workplace relationships that, although appearing on the fringe, contain warm human connections.