Lin Luming, the financial ace of an Internet company, was laid off by Song Shiyu, the parachuted CEO. On the day she left her job, she accidentally got a ridiculous part-time job - working as a cashier for Song Shiyu's new "genius barista". She disguised her identity to make a living and joined the job, only to discover that the barista was Song Shiyu himself. The two confront each other in lies and temptations, and engage in workplace slang and coffee latte art. Lin Luming holds the company's financial information and plans to take revenge, but discovers that Song Shiyu has something else to hide. At the same time, a hidden line quietly unfolded: a mysterious investor was secretly acquiring shares of the company, and this person seemed to be related to Lin Luming's brother who disappeared ten years ago.