The story of a huge incident faced by Seo Soo-yeon from the support management team that supports and manages NIS field agents in China, Jang Cheon-woo, a hidden NIS black agent and Do Jin-sook, deputy director of overseas parts.

• Park Ha-seon
• Jung Moon-sung
• Jang Young-nam
• Jun Seok-ho
• Kim Jong-tae
• Choi Deok-moon
• Hwang Hee