Single parent Christine Collins is a supervisor at the local telephone exchange who, having returned home late from having to work overtime on a Saturday, finds her 9 year old son Walter is missing from their home. As the days and weeks go by, the Collins case becomes the object of a campaign by Pastor Gustav Briegleb who rails against the incompetence and corruption of the Los Angeles police Department. Soon, the police arrive with the news that they have found her boy but when the lad is turned over to her, she realizes that the police have returned a stranger to her in an attempt to bring an end to the public complaints about their handling of her case. Her attempts to get justice bring her into conflict with the LAPD who will go to any length to protect their reputation. When she continues to complain she finds herself arrested and confined to the mental ward.