Hyunjun and Sawoo, close friends and rivals from the South Korean special forces, are recruited by the secret agency NSS. They both fall for Seunghee, the beautiful but lethal profiling specialist at NSS. When they are faced against each other in a nuclear terrorist attack, they are forced to make their final decision and Seunghee's formidable secret is revealed.
When a young gang leader seems to be just a bit too stupid to effectively carry out his daily tasks, his superiors order him to go back to school for his high school diploma. Posing as a 19-year-old, he soon learns that the school is even more corrupt and vicious. Wrath is unleashed.
After a successful first season, Webtoon "Assassin Jun" is about to begin it's second season. Out of ideas, Jun uses an anonymous email's plot in his Webtoon, only to see real-life terrorist attacks resembling the story unfold.
One day, Hyun-joon, a policeman who lives with his mother and his daughter, attains a superpower after getting struck by the lightning. After the incident, Hyun-joon realizes that there are others who have been going through the same situation with him, and gets involved with unexpected situations. Will he be able to succeed both, as a father who struggles with the relationship with his daughter, and as a cop with a superpower who is eager to catch an evil criminal?