"Léon: The Professional" is a 1994 French action-thriller film directed by Luc Besson. The story follows Léon, a skilled hitman living in New York City, who reluctantly becomes the guardian of a young girl named Mathilda after her family is murdered by corrupt DEA agents. As Léon trains Mathilda in the art of assassination, they develop a unique bond that challenges their understanding of love and morality. The film explores themes of loneliness, redemption, and the impact of violence, showcasing strong performances by Jean Reno as Léon and Natalie Portman as Mathilda.