In a big city like Philadelphia, it's easy for an unsolved murder to slip into the cold files and be forgotten. But in this case, one victim's boyfriend was set on doing everything possible to make sure people didn't forget, and that police didn't stop investigating.
When an 18-year-old hitchhiker is found in a ravine, the autopsy reveals her killing is perhaps the most brutal the examiner has ever seen. Detective McManus is struck by this case, and so he makes a promise. He's going to find the person who committed this crime, no matter how long it takes.
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