It begins with a single, ordinary object: a warm mug on a porch rail, its steam rising into the pre-dawn air. This was the last moment of normal for Nora, a night-shift nurse in the quiet town of Cedar Vale. Her shoes were by the mat. Her dog was scratching at the door, waiting. But Nora was gone.
Investigators call this the threshold. The precise point where a life simply stops, leaving behin...
