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, Jo Yeong-hoon