Ji Kang-in, the leader of the Black Team, who is engaged in South Korea's overseas secret operations, is active in the Shenyang area. Kang-in is experienced and often called "Yaksha", and he will do whatever it takes to complete his mission. One day, the National Intelligence Service (NIS) discovered that all the reports on the movements in the Shenyang area were false, and this report was provided by the Black Team. Yeom Jeong-won, the 4th director of the National Intelligence Service, was deeply disturbed by this and sent Han Ji-hoon from the Seoul Central District Prosecutors' Office as a special prosecutor. Yaksha and the Black Team tried to get rid of special prosecutor Ji-hoon, but Ji-hoon stubbornly followed the actions of the Black Team.