In 1977 Florida Nurse Deborah Clark, 23, is found brutally slain in her home. Detectives unearth an affair, a jilted wife, and a web of money and power, but no true suspect. It will take 40 years and advanced DNA testing to expose Deb's killer.

A 2007 cold-case resurfaces when a detective reopens the investigation into the brutal killing of Audrey Giannotti, 20, in rural Pennsylvania. Uncovering hidden secrets, he races against time to bring justice to a family desperate for answers.