Woman who survived a mass murder as a girl seeks answers. Digital HD Year 2015 Theatrical Release 2015-08-07 Video Release 2015-10-06 Studio A24 Films Genre Suspense MPAA Rating R CARA some disturbing violence, language, drug use and sexual content Color Color Runtime 113 Animated Live-Action Full Synopsis Libby Day Charlize Theron was only seven years old when her mother and two sisters were brutally murdered in their rural Kansas farmhouse. In court, the traumatized child pointed the finger at her brother, Ben Tye Sheridan , and her testimony put the troubled 16-year-old in prison for life. Twenty-five years later, a broke and desperate Libby has run through donations from a sympathetic public and royalties from her sensational autobiography, without ever moving past the events of that night. When Libby accepts a fee to appear at a gathering of true-crime aficionados led by Lyle Wirth Nicholas Hoult , she is shocked to learn most of them believe Ben is innocent and the real killer is still at large. In need of money, she reluctantly agrees to help them reexamine the crime by revisiting the worst moments of her life. But as Libby and Lyle dig deeper into the circumstances surrounding the murders, her recollections start to unravel and she is forced to question exactly what she saw or didn't see. As long-buried memories resurface, Libby begins to confront the wrenching truths that led up to that horrific night. Director Gilles Paquet-Brenner Cast Gilles Paquet-Brenner; Charlize Theron; Christina Hendricks; Chloe Grace Moretz; Nicholas Hoult; Corey Stoll; Tye Sheridan; Drea de Matteo; Dora Madison Burge; Laura Cayouette; Azure Parsons