In this explosive follow-up to the story of a teenager who decided to become a superhero, Dave Lizewski, now known as Kick-Ass, has left his normal life behind and is fully immersed in the world of crime-fighting. With the help of his friend Hit-Girl, a young combat prodigy, they face a new challenge when a real villain emerges on the horizon: the fearsome Chris Genovese, who seeks to avenge his father's death and is determined to turn an army of superheroes into a group of villains.
Meanwhile, Dave attempts to lead a normal life as a young adult, dealing with his own personal issues and his relationships with family and friends. As he becomes more involved in the fight against crime, he joins a group of justice enthusiasts called Justice Forever, led by the charismatic Colonel Stars and Stripes. However, the struggle intensifies, and things become increasingly dangerous when Chris's army launches a large-scale attack.
The film maintains its characteristic dark humor and over-the-top action as Dave and his allies face unexpected challenges and must learn that the fight for justice is not just a matter of capes and swords, but of sacrifice and friendship. The final battle is a blend of stylized violence and genuine moments that will redefine what it means to be a hero.