One hot summer's afternoon, five-year-old Ava Sawyer went to a party. She never came home... Two years later, Ava's body is found and another little girl, Audrey Briggs, goes missing. Audrey also attended that party... Leading the investigation is Detective Natalie Ward. A mother of two teenagers, this case chills her to the bone, and is a disturbing reminder of the last job she worked on. One that still keeps her awake at night... Natalie soon discovers that Ava's mother has some worrying gaps in her alibi and as she digs deeper, she's sure Ava's father is not telling the full story.