Lost Girls is a true crime movie based on the real-life story of Mari Gilbert, a mother who tirelessly searches for her missing daughter and uncovers a string of unsolved murders of young women. The film sheds light on the failures of law enforcement and the systemic issues surrounding the investigation of missing persons cases. With a powerful performance by Amy Ryan, Lost Girls is a gripping and emotional portrayal of a mother's fight for justice and the flaws within the criminal justice system.