In 1979, the tiny town of San Miguel, California, was shaken when two kindergarten girls vanished in broad daylight from a main street. Despite a long list of local child predators and bizarre clues, the trail went cold in a matter of years. But now, nearly 5 decades later, the very detective who solved the Kristin Smart case has come out of retirement to take another look, and he’s closer than ever before to a solve.