13-year-old Henry Hart unexpectedly got a special opportunity to become the assistant of the superhero "Captain Man" and became his assistant trainee "Dangerous Boy".However, this enviable identity also presents unprecedented challenges – he must balance his daily campus life in eighth grade with the thrilling crime-fighting mission.In this two-sided life full of jokes and growth, Henry not only has to deal with the troubles of adolescence, but also has to learn to protect justice in a crisis-ridden city and grow into a true hero.