The story will tell the viewers about a stuntman named Cha Dal Gun played by Lee Seung Gi who stumbles with a massive corruption scandal while trying to uncover the truth behind this mysterious plane crash that happened.

Otherwise, he teams up with a National Intelligence Service (NIS) secret agent named Go Hae Ri played by Suzy to investigate the case. Moreover, actress Suzy stated, "I approached my character by sharing a lot of opinions with the director and the other writers of the story. I decided to make Go Hae Ri as someone with little passion for work who does no more than her given duties at work."

Afterwards, she added, "I wanted to show her inner turmoil as someone who doesn't want to get caught up in the case as much as possible but gradually begins to focus on the case and the people around her as she goes through various processes. To make her choices seem more realistic, I didn't give her a sense of justice at first, and gradually, I wanted the audience who'll watch the drama to share her feelings of the decisions that she made over time."

Therefore, this is the first time ever that Suzy had done such a diverse drama work that costs 25 billion won approximately $21 million, and to make one year to film it. However, this drama holds special meaning to the actress since it is a new challenge for her especially for acting career in the industry.

Suzy also stated, "Despite the pressure of success, I was more excited for this drama. I was happy to be part of a good drama with a great director, writers, production crew, teams and senior actors. With regards to the difficulty of experience while filming the drama series for about a year", she explained, "I was physically exhausted from filming for a long time, but there was a sense of joy that I couldn't explain when I finished the long term filming experience. This drama has a special place in my heart, and I feel like it gave me a lot of those unforgettable memories from learning many things in my life as an actress."