Season 1
Baek Chan Mi is a legendary agent for the National Intelligence Service. However, due to an excessive operation, one of her subordinates passes away. After this incident, she takes back all hope of returning to the field when she gets an order to go undercover. She begins working as a secretary for Ilkwang Hitech under the name, Baek Jang Mi. She is joined by a single mother, Im Ye Eun, who has the beauty of a girl group member, and Hwang Mi Soon, a housewife of 18 years whose family believes her to be an insurance salesperson. These three women begin to work together. Meanwhile, Ilkwang Hitech’s CEO, Yoon Seok Ho, knew Chan Mi as his tutor and had a crush on her. He can’t help but think that his new secretary, who looks exactly like his first love but has a different name and age, is a bit suspicious.
Episodes
1 The New Team / Three Years Ago Apr 27, 2020 
2 Job Interviews and First Day of Work / Obstacles at Every Turn Apr 28, 2020 
3 Getting Out Undetected / A Glimpse into the Dark Connections May 4, 2020 
4 Visiting a Celebrity and Going to a Club / Code Blue May 5, 2020 
5 High Speed Chase / Tracking Down The Chip May 11, 2020 
6 Flying Back / Defusing The Bomb May 12, 2020 
7 A Possible Leak / Back In The Lab May 18, 2020 
8 Being Followed / Coming Face To Face May 19, 2020 
9 Threats and Secrets / An Offer from the Enemy May 25, 2020 
10 Finding a Way In / Breaking and Entering May 26, 2020 
11 Luring in Chief Seo / Identity Revealed Jun 1, 2020 
12 Chan Mi Gets Shot / Critical Condition Jun 2, 2020 
13 Chan Mi Goes Back to Work / Working Together Jun 8, 2020 
14 Director Myeong Gets Arrested / Teaching The Bullies A Lesson Jun 9, 2020 
15 Michael’s Identity Is Revealed / Heading To Jeju Island Jun 15, 2020 
16 Finally Catching Michael / Six Months Later Jun 16, 2020