Sally O'Malley made a promise to her daddy before he died. She swore she'd look after her sister, Troo. Keep her safe. But like her Granny always said-actions speak louder than words. Now, during the summer of 1959, the girls' mother is hospitalized, their stepfather has abandoned them for a six pack, and their big sister, Nell, is too busy making out with her boyfriend to notice that Sally and Troo are on the Loose. And so is a murderer and molester.