Miu (Stephy Tang) applied for a job at an underwear company and ended up getting a job as an underwear investigator. At the same time, her aunt, who had been single, passed away, and Miu moved into her aunt's luxurious home with her cousin Donut (Jason Wen), who was known as the "uncle killer". At the company, Lucas (Ronald Cheng), a teenage killer from the marketing department, tried to overthrow Miu but failed, and then treated her as a friend. Under Lucas's guidance, Miu was involved in absurd relationships with a "bank manager", a famous talent, and a narcissistic company prince. Celina, a stewardess who lives downstairs from Miu, frequently loses her underwear. When she calls the police, she gets acquainted with auxiliary police officer Shen Jiajun (Xu Tianyou). The two soon live together, but the price is that the auxiliary police officer cannot hinder the stewardess' dream of climbing up the social ladder... CC (Jia Xiaochen), a hotel public relations officer whom Miu met during market research, happens to meet shy Harvard graduate Eugene (Andy On), who helps CC find hope for love... Several girls are stumbling on their respective love paths, and underwear is given more meaning in the process of their search.