On July 31st 1970, in the small town of Price Utah, 4 year old Heidi wakes up to eerie silence, and after peeking through the keyhole of her bedroom door, she sees a terrifying scene that will stick with her forever: the tragic murder of her mother. However, no one is convicted, and before the case file is officially marked as unsolved, Heidi’s grandmother takes one last photo of her, standing in front of the outline: nobody could imagine that this photo would actually hide the key to solve the murder, which will only be done 46 years later.