Kang Geon, a 17-year-old who transfers to an elite high school attended by only the top 0.1% in South Korea. Trained since the age of five in North Korea as both a secret agent and a human weapon, as well as a genius, he is given the mission to infiltrate South Korea’s high society and build connections. However, making friends turns out to be an even greater mission. Living as part of a fake family with his father, a world-watched hacker, and his mother, a legendary assassin, he embarks on a spy action drama in search of true happiness!