Jun is a top agent of the National Intelligence Service who can strike down dozens of terrorists in one fell swoop. Disenchanted with his life, Jun disguises his death and succeeds in leaving the NIS to lead a normal life as a family man and fulfill his dream of becoming a webtoon artist. However, his unexciting webtoons are ignored by readers and even his wife. Depressed and angry at himself, Jun suddenly draws a webtoon of his past as a secret agent.

Jae-ho, who aims to become the number one in a crime organization, gets to build up trust with Hyun-su, an ambitious newbie in the prison. While they try to take over the organization after the prison release, their ulterior motives starts to emerge.