Back in Los Angeles at 1928, single mom Christine Collins returns home to find her nine-year-old son, Walter, is overlooking. Reverend Gustav Briegleb publicizes Christine's predicament and railings against the Los Angeles Police Department (LAPD) because of the incompetence, corruption as well as the extrajudicial punishment meted from its own"Gun Squad" headed by Chief James E. Davis. Considering the favorable marketing will worsen recent criticism of this section, the LAPD arranges a people reunion. Even though"Walter" asserts he's Christine's son, she states he's not. Following Christine faces Jones with bodily discrepancies between"Walter" along with her son, Jones arranges for a medical physician to see her. He tells Christine that"Walter" is just three inches shorter than his disappearance because injury has shrunk his backbone, which the guy who shot Walter had him circumcised. A paper presents a story that suggests Christine is a unfit mother; Briegleb informs Christine it had been planted by police to discredit her. She befriends inmate Carol Dexter, who informs Christine she's among many women who were shipped there for hard police jurisdiction. Dr. Steele diagnoses Christine as delusional and compels her to shoot mood-regulating tablets. Steele says he'll launch Christine when she admits she had been confused about"Walter"; she fails. Detective Ybarra travels into a ranch at Wineville, Riverside County, to organize the deportation of 15-year-old Sanford Clark into Canada. The boy's uncle, Gordon Northcott, has fled following a chance encounter with Ybarra, who cites his company being a juvenile issue. Clark informs Ybarra that Northcott compelled him to assist kidnap and murder about twenty kids, and defines Walter as among these. Jones informs Briegleb that Christine is currently in custody after a psychological breakdown. Jones orders Clark's deportation, but Ybarra chooses Clark into the murder site and informs him to dig in which the bodies have been buried. Clark hesitates, but soon uncovers human body components. Briegleb secures Christine's launch by demonstrating Steele a newspaper story about the Wineville killings that titles Walter as a potential victim. Under interrogation from Ybarra, Walter's impostor shows his purpose was to procure transport to Los Angeles to watch his favourite celebrity, Tom Mix, also says the authorities advised him to lie around being Christine's son. The authorities catch Northcott at Vancouver, British Columbia, Canada. Meanwhile, the Briegleb introduces Christine and her situation to renowned lawyer"S.S." Hahn who chooses the instance pro bono and immediately secures a court order for the release of additional unjustly imprisoned girls whom the authorities wanted to silence. On the afternoon of the city council's hearing to the situation, Christine, Hahn, and Briegleb arrive in Los Angeles City Hall, in which they experience thousands of protesters that are demanding answers from town and decrying that the LAPD. The hearing is intercut with scenes out of Northcott's trial. The authorities concludes that Jones and Davis must be removed from responsibility, which extrajudicial internments by authorities have to be stopped. 2 decades after. Northcott sends her a message stating he's ready to admit to murdering Walter on illness that Christine meets him prior to his execution. She visits Northcott, but he won't tell her when he murdered her son. Northcott is implemented the following day. Back in 1935, David Clay, among the boys supposed to have been murdered, is located alive in Hesperia, California. He shows that among those boys whom he had been imprisoned was Walter. David, Walter, and yet another boy escaped, but had been split. David doesn't understand whether Walter was recaptured, however he states Walter helped him escape, providing Christine trust he's living. California's state legislature made it illegal to commit individuals to psychiatric centers by mere words of government, and Rev. Briegleb continued to utilize his radio series to expose police misconduct and governmental corruption. Wineville is thought to have changed its title to Mira Loma to escape the stigma of their murders, and Christine Collins allegedly never stopped looking for the son.