Eleven years after the accident, Evan is living in an orphanage. Evan starts to believe that he will be reunited with his parents, which gets him bullied by the other kids. After meeting a social worker, Evan runs away to New York City, hoping to find his family. After losing his social worker's business card, the boy wanders the city until he finds a young musician named Arthur. After following Arthur to his home, an abandoned theater, Evan meets Maxwell "Wizard" Wallace. Maxwell is a musician who employs children as street performers after teaching them music. After Evan shows promise on the guitar, Maxwell gives him the stage name August Rush and tries to promote him for profit.
After escaping raids from the police trying to find him, Evan meets a girl who shows him written music. Evan eventually gets spotted by Julliard staff, and is invited to be a student. Evan's music eventually forms into a rhapsody, and a concert is held for him. Evan eventually decides to leave Maxwell for good after he forbids him from attending his own concert. He follows the sound of a cello to get to the concert. While Evan is conducting his rhapsody, his parents have reunited. The movie ends when Evan turns around and smiles at them, realizing that they are his parents.