Joni, now a seasoned child psychologist, returns to the small town where she spent her childhood. The local kids are still playing a game of "Playing Gracie Darling," a seemingly harmless game that involves pretending to be Gracie Darling and hiding under the bed or other hiding places. However, as the game progresses, it turns sinister when another girl disappears.
Joni, along with a police sergeant named Jay, begins investigating the case. They interview the children and their parents, but soon discover that there is more at stake than just the missing girl. Gracie Darling's sister Ruth has also gone missing under similar circumstances, which adds an extra layer of tension to the investigation.
As they dig deeper into the case, Joni and Jay uncover a dark secret about Gracie Darling's past that shocks them both. It seems that Gracie Darling was involved in a dark ritual involving the possession of young girls, and she had been trying to cover up her involvement by pretending to be someone else.
Joni realizes that this knowledge could have devastating consequences for the community if it were to fall into the wrong hands. She and Jay decide to take matters into their own hands and confront Gracie Darling, hoping to expose her true nature and put an end to her destructive behavior.
In the midst of the investigation, Joni's relationship with Jay takes a turn for the worse. He becomes increasingly suspicious of her motives, questioning whether she truly believes that Gracie Darling deserves to be punished. As the investigation continues, Joni must navigate her personal feelings for Jay while also protecting the community from the dangers that Gracie Darling represents.
In the end, Joni and Jay are able to bring Gracie Darling to justice, but the cost is high. Gracie Darling is sentenced to prison for her crimes, and the townspeople must come together to heal from the trauma caused by her actions. As the dust settles, Joni realizes that she has learned valuable lessons about the power of darkness and the importance of standing up for what is right.