"The Butterfly Effect" is a 2004 American psychological thriller film directed by Eric Bress and J. Mackye Gruber. The movie stars Ashton Kutcher, Amy Smart, Elijah Wood, and Karyn Kusama. The film's plot revolves around Evan Treborn (played by Ashton Kutcher), a young man who discovers that he can travel back in time and change events from his past. However, each change has unintended consequences, illustrating the butterfly effect concept.

The movie follows Evan Treborn, a troubled young man who has experienced traumatic events throughout his childhood. As an adult, Evan discovers that he can travel back in time and alter events from his past. He uses this ability to try and fix the mistakes of his past and improve his life. However, each change has unexpected and often disastrous consequences. Evan soon realizes that changing the past is not as simple as he thought, and he must navigate the complexities of time travel and the butterfly effect.