The document provides a plot summary and analysis of the thriller film Leon. It summarizes that the film is about a 12-year-old girl, Mathilda, whose family is killed by corrupt police officers. She seeks help from her neighbor Leon, a hitman, who reluctantly takes her in. Mathilda learns Leon's skills as a hitman to seek revenge for her family. Leon comes to see Mathilda as a daughter and protects her from the police officer who killed her family. In the climax, Leon sacrifices himself to save Mathilda, leaving her his money so she can get her life back on track.