In March 1928 in Los Angeles, California, Christine Collins (Angelina Jolie) lives with her beloved son Walter (Gattlin Griffith) in Lincoln Heights. When she is assigned to work overtime on Saturday at Pacific Telephone and Telegraph as supervisor, she promises Walter she will return at 4 p.m. to take him to the latest Charlie Chaplin picture at the movie theater. However, she arrives home late to find Walter gone. After searching the neighborhood for him, she reports his disappearance to the police, but the officer tells her that she should wait 24 hours to register the complaint. Five months later, Captain J.J. Jones (Jeffrey Donovan) communicates to Mrs. Collins that her son has been found in DeKalb, Illinois, and is heading back home by train to be reunited with her. In the train station, Christine does not recognize the boy as being Walter, but Captain Jones advises her that his appearance has changed during the five months. Soon, she confirms that the boy is not her son, but the corrupt L.A.P.D. rejects her arguments. When Mrs. Collins is approached by St. Paul Presbyterian Church Pastor Gustav Briegleb (John Malkovich), who daily broadcasts protests exposing corruption in the police force, she decides to disclose to the press the evidence she has about the changeling. However, the abusive Captain Jones sends Christine to an asylum to intimidate her. Meanwhile, the efficient Detective Lester Ybarra (Michael Kelly) is assigned to arrest and deport an illegal Canadian boy who was hidden on a ranch in Wineville. He captures the boy, who discloses hideous crimes committed by his compatriot Gordon Stewart Northcott (Jason Butler Harner).—Claudio Carvalho, Rio de Janeiro, Brazil