October 1984, Dallas, Texas. Angie Samote, a college freshman at Southern Methodist University is brutally raped and murdered in her apartment. Police first suspect her boyfriend but then zero in on a man she had met shortly before her murder. They recruit Angie's best friend Sheila Wysocki to help with the investigation. Unable to charge anyone, the case goes cold. But 20 years later, Sheila renews her vow to find Angie's killer.