Alex McKnight doesn't leave Michigan's Upper Peninsula if he can help it. He steers clear of Detroit in particular, where he once worked as a cop. The city will forever remind him of his partner's death and of the bullet still lodged in his own chest. But a woman he can't shake has drawn him back to finally see what's there between them.

While he's in the city, he can't help but stop by his old precinct. It's now closed, like the countless abandoned buildings that surround it. His visit has reminded him of a case he was working on during that last summer. After his partner was killed and Alex left the force, the case was solved, and a man was sentenced to life in prison for the crime. Alex remembers something, a seemingly small piece of the puzzle that he never got to share. But all these years later, when he looks up the now-retired lead detective, this new piece of information doesn't exactly get a warm reception. The detective solved the case, after all, and justice was served.

Until Alex does a little more digging and finds out that the real culprit might have gotten away. And might still be out there, preying on more victims...