Mercy Street - Mariah Stewart

It's a balmy spring evening when four teenagers meet for the final time - the next morning, two are dead, the others missing. Were they, too, the victims of a ruthless killer? Or are the missing kids on the run for murder?

Ex-cop turned PI Mallory Russo is determined to figure out what happened in the park that night. And with the unofficial help of detective Charlie Wanamaker she resolves to find the kids and prove their innocence - whether they be dead, or alive. But what Charlie and Mallory discover will take them down a twisted path that leads to an old unsolved murder - and justice for a killer with a heart of stone.