A young family is found murdered inside their home, all the doors and windows locked, and no sign of forced entry.

Who is responsible for the deaths? Could someone inside the house have committed this terrible act?

Detective Ryan Chase is struggling through his own dark times, his OCD steadily getting worse. But he won't allow his personal problems to affect his focus on the case. Together with his partner, DS Lawson, he won't rest until the killer is brought to justice.

A man is out there, one who can see into people's lives. And he has another family in his sights...