This was a great introduction to the two main characters in the story. The book starts on the day of the murder with a prologue that grabs your attention right away. The next two chapters introduce us to our main characters, Olivia and Reagan, years later as they prepare to return to Camp Lost Lake. After this introduction, we jump back in time again to the day before the murders. This begins our dual timeline pattern. Each chapter of the first impression was equally engaging and I can't wait to see where the story goes.