The sole survivor of a home invasion where she famously witnessed the death of her mother and sisters, Libby Day (Theron) lives with the knowledge that her testimony as a 7-year-old sentenced her brother to life in prison for the horrific crime. When a group of true-crime enthusiasts find Libby twenty-five years later and convince her to re-examine the events of the night, new memories and old suspects suddenly flood back into her life. As shocking information comes to light, Libby begins to question her own key testimony and sets out to discover the truth of her tragic past.