Mindy McCready is subjected to public school, which goes against all of her instincts. The story covers the rise of The Motherfucker and the bond between Mindy and Dave as well as covering the reasons for Hit-Girl's retirement from crime-fighting by the beginning of Kick-Ass 2. The story also has more insight into the life of Mindy McCready, showing the stress she deals with by being bullied by peers, such as Debbie Foreman (whom Mindy dangles off the roof, in attempt to make Debbie her best friend).
The plot also helps to tie together the end of Kick-Ass and the rise of costumed heroes seen in Kick-Ass 2.
Hit-Girl was well received and has been reported sold out in many stores according to creator Mark Millar; this is partly due to the popularity of the film. Hit-Girl was called visually stunning by comic book blog eatpraymedia.com