A spy turned webtoon writer, the most slash life in history? The secret organization "Anti-Kite" of the South Korean National Intelligence Agency specializes in training helpless children into top spies. Among them, the agile spy Ajun (Kwon Sang-woo) is personally trained by the devil coach Cheon Deok-gyu (Jung Joon-ho). His quick, ruthless and accurate skills have wiped out countless criminals in one fell swoop, becoming a gold medal spy that even terrorists are afraid of... However, Ajun has a small dream in his heart - to become a super popular webtoon artist! So, he decided to fake his death during a mission and escape, hiding his identity and working hard to draw for 15 years, but his comics were hated by netizens, and he was even ridiculed as a middle-aged loser who was supported by his wife Mina (Hwang Woo-seul-hye). One night, the depressed Ah Jun drank to relieve his sorrow and drew a cartoon about his life as a spy and uploaded it. It became an overnight sensation. This unintentional act caused an unprecedented sensation among netizens and even attracted a large-scale hunt by the intelligence agency and terrorists...