When a terrorist bombing occurs in Seoul, profiling specialist, NCI agent Kang Ki Hyung, is brought in for his opinion. However, due to a wrong call, Special Tasks Force Agent, Kim Hyun Jun, ends up losing a friend. One year later, Hyun Jun and Sun Woo are investigating a case of a kidnapped woman. However, when the younger sister of his dead friend is kidnapped, he has no choice but to turn to the NCI for help. (Source: Viu)