Peace, safety, a place to grieve and heal. After her husband is murdered by the Russian mob, Boston detective Callie Jean Morgan comes home to her family's cottage in South Carolina. There, she can keep their teenage son, Jeb, away from further threats.

But the day they arrive in Edisto Beach, Callie finds her childhood mentor and elderly neighbor murdered. Taunted by the killer, who repeatedly violates her home and threatens others in the community, Callie finds her new sanctuary has become her old nightmare. Despite warnings from the town's handsome police chief, Callie plunges back into detective work, pursuing a sinister stranger who may have ties to her past. He's turning a quiet paradise into a paranoid patch of sand where nobody's safe. She'll do whatever it takes to stop him.