Baek Chan-Mi was a legendary black agent for the NIS, but, due to her excessive work, her subordinate died and she missed catching her intended target. Baek Chan-Mi was punished for that botched case and she now works in a cyber security team for the NIS. Baek Chan-Mi is then selected to go undercover on a case involving intellectual property theft at Korea's largest company.

• Choi Kang-hee
• Yoo In-young
• Kim Ji-young
• Lee Sang-yeob
• Lee Jong-hyuk
• Lee Jun-young
• Heo Jae-ho
• Jeong In-gi