Zeke Cabot is smart, tough, and one of the top Special Agents in the FBI's Chicago Field Office. She's also recovering from a traumatic head injury and months of being undercover on the mean streets of the Windy City. She agrees to an extended vacation in New Mexico to help her recover from her physical and emotional duress.

She meets Anne Reynolds, a home health nurse, who is recovering from a failed sham marriage. Surrounded by the breathtaking New Mexico landscape, they are pulled into the horror of a serial murder case that Zeke thought was closed.

Zeke's PTSD runs dark and deep and threatens to overwhelm their fledgling relationship. But every once in a while, two opposing energies can merge to create a stronger alloy-but the laws of physics, like love, can be fickle.