"A Nightmare on Elm Street" is a horror film that follows a group of teenagers who are haunted by a mysterious figure named Freddy Krueger. He invades their dreams, turning their sleep into a terrifying battleground. If they die in their dreams, they die in real life, creating a chilling race against time for the teens to stay awake and find a way to stop him. The story centers around Nancy Thompson, one of the main characters, who discovers that Freddy was a child murderer killed by the parents of Elm Street. As she learns more about his dark past, Nancy must confront her fears and fight back to save herself and her friends from Freddy's deadly grasp.