When Madison McClone reads the mysterious caption on the back of a photograph of her mom and two friends as children, babysitting her little sister Mackenzie becomes second priority to discovering what the caption means. Madison expects to find something silly, like a game her mom and friends used to play. However, she is not even close. What she finds is that one of the girls in the photograph, Laury, went missing about thirty years ago and was never found. Madison's world turns upside down when she devotes her summer to uncovering the deep secret that the caption and photograph hold. Madison is forced to believe in the supernatural when Laury begins to find ways to communicate with her in strange ways. Laury wants one thing and one thing only: the truth to be revealed. She threatens Madison and forces her to make her mom tell the truth about that picture and the events that took place right after it was taken, but her mom denies ever knowing Laury. Angered, Laury jumps at every opportunity to destroy something that belongs to Madison or her family, making Madison's life a living nightmare. Soon, Laury's little manipulative mind games turn deadly and dangerous when the McClones end up living with an old classmate of her mom, Belinda. Madison sees this as an opportunity and uses all of her resources to discover the secret her mom is so desperately trying to hide. Madison soon finds out that her mom is not the only one keeping that secret of the caption. Belinda is in on it too. With more and more people becoming suspicious about the awkward happenings, it becomes harder and harder to keep the secret hidden. Finally feeling accomplished, Madison is positive that with a little more time, she can reveal the secret that's been haunting her whole summer. There's just one problem; Laury does not want to wait anymore. She's vicious, dangerous and eager to kill if it means justice. And Laury's not stopping until she gets her justice.