Dotty Stone is the security guard on duty the night a young woman is savagely murdered. A murder she slept through. A murder she could have prevented. She would give anything to go back and make things right. For the murderer, it was the most perfect thing he'd ever done. And he will do anything to recreate it - again and again and again.
Alternating points of view, we follow the killer - handsome, rich, and obsessed with murder - and Dotty - a woman struggling to care for her sickly husband and autistic adult son. Dotty knows in her heart that the killer will strike again.