As an assistant D.A. for Massachusetts' Barnstable County, Marty Nickerson sees her job as a means for doing right. When a jury finds Manuel Rodriguez guilty of a brutal murder committed on a Cape Cod beach at the beginning of last year's tourist season, Marty feels vindicated. But then another body turns up as this year's vacationers begin to arrive and Marty has to wonder: Did they target the wrong man? The D.A. refuses to reopen the high-profile case, but Marty fears that the real killer will strike again. With her career on the line and lives at stake, she must rely on her own moral compass, legal savvy, and gut instinct as she matches wits with a twisted killer.