While examining previous journal entries, Evan comes to learn that he is gifted, or perhaps cursed, with the power of time travel, allowing him to correct some of the mistakes of his past. In one harrowing sequence, Evan goes back to his youth to prevent his childhood friend’s father from sexually abusing him and the other neighborhood kids, changing the course of his future forever. As The Butterfly Effect builds to an epic climax, Evan learns that his ability to change the past may not always work in his favor, and that some of his trauma was necessary to shape him into the person that he is today.