UNDERCOVER MISS HONG: FULL STORY, VIDEO, CAST.

As Keum-bo navigates life as an inexperienced entry-level employee, she encounters comedic mishaps, unexpected friendships, and workplace drama, all while secretly investigating financial wrongdoing.

Along the way, she must balance her dual identity, confront corporate intrigue, and navigate complicated relationships, including her interactions with the ambitious CEO Shin Jung-woo and her lively younger sister Hong Jang-mi.

• Park Shin-hye as Hong Keum-bo

A senior inspector of the Capital Market Investigation Division at the Financial Supervisory Service (FSS) and a Certified Public Accountant, Keum-bo is a Seoun University graduate known for her specialty in investigating economic crimes. When her key contact, Myeong-hwi, dies in a car accident before he can provide evidence of corporate corruption, the investigation’s whistleblower goes into hiding. Under the direction of her superior, Keum-bo undergoes an undercover assignment to retrieve a secret ledger from within the Hanmin Investment & Securities. With the help of her sister, Hong Jang-mi, she assumes her younger sister’s name and be a 20-year-old high school graduate, and enters the firm as a junior clerk during their 1997 recruitment cycle.

• Ko Kyung-pyo as Shin Jung-woo

A management consultant and corporate investigator who is appointed as the new president of Hanmin Investment & Securities after working at an investment firm in Hong Kong. He prioritizes financial data in his business operations and has a history of using various methods to achieve corporate objectives. His plans change when he meets Hong Jang-mi, who resembles his former college acquaintance, Keum-bo. Although told that Jang-mi is Keum-bo’s younger sister, he remains skeptical of her identity while managing a professional crisis that leads him to reconsider his previous methods.

• Ha Yoon-kyung as Go Bok-hee

A secretary at Hanmin Investment & Securities and Jang-mi’s dormitory roommate. Due to financial instability caused by her brother’s gambling, she seeks to save one million dollars to immigrate to the United States. Following the death of the company president, she is served a termination notice but remains employed after Jang-mi intervenes on her behalf. Although she accepts the assistance, she maintains a skeptical attitude toward Jang-mi’s background and motivations.

• Cho Han-gyeol as Albert Oh

The grandson of Chairman Kang Pil-beom and Division Manager of the Risk Management Division at Hanmin Investment & Securities. Following the death of his uncle, Myeong-hwi, he is designated as a successor candidate by Chairman Kang. A former film student, he shows little interest in corporate management and spends his work hours watching movies. He becomes involved in the company’s internal power struggles after taking an interest in Jang-mi, an entry-level clerk whose actions frequently disrupt the workplace.