"I'll get out, and I'll get even."

Gabby St. Claire is back to crime-scene cleaning, at least temporarily. With her business partner on his honeymoon, she needs help after a weekend killing spree fills up her work docket. She quickly realizes she has bigger problems than finding temporary help.

A serial killer her fiancé, a former prosecutor, put behind bars has escaped. His last words to Riley were: I'll get out, and I'll get even. Pictures of Gabby are found in the man's prison cell, and Riley fears the sadistic madman has Gabby in his sights.

Gabby tells herself there's no way the Scum River Killer will make it across the country from California to Virginia without being caught. But then messages are left for Gabby at crime scenes, and someone keeps slipping in and out of her apartment.

When Gabby's temporary assistant disappears, Gabby must figure out who's behind these crimes. The search for answers becomes darker when Gabby realizes she's dealing with a criminal who's more than evil. He's truly the scum of the earth, and he'll do anything to make Gabby and Riley's lives a living nightmare.