Ten-year-old P has never known what it means to have a home.

Shuffled through Chicago's foster care system, he's learned to keep his head down, his mouth shut, and his expectations low. Some homes are worse than others. Some people are worse than they appear. And some things are better left unsaid.

Then the accidents begin.

A violent assault. A suspicious death. A disappearance that leaves investigators with more questions than evidence.

What initially appears to be a series of unrelated incidents takes a disturbing turn when two Chicago detectives uncover a common thread. At the center of every case is the same quiet, unassuming little boy.

Ten years old. No criminal history. No apparent motive.

And an unsettling habit of being the last person to see certain people alive.

As the body count rises and the evidence grows increasingly contradictory, the detectives find themselves chasing a suspect they cannot arrest for crimes they cannot explain.

But in a city where monsters rarely look the part, appearances can be dangerously deceiving.

And some children have learned far more from the darkness than how to be afraid.