Four teenage girls are brutally murdered in a yogurt shop in North Austin, Texas, in 1991, in what becomes the biggest mass murder in Austin history. The investigation that follows drags on for years, and even when police make an arrest, justice is not guaranteed.

When a 19-year-old girl is found murdered in her boyfriend's bed in a small Texas town, everyone is a suspect. The case goes cold until a new sheriff comes to town who sheds fresh light on some old evidence, but will it be enough to bring her killer to justice?