1979. Sixteen-year-old Carolyn Russell grows increasingly infatuated with her school mathematics teacher who is also giving her private lessons. Then she disappears. 2014. Struggling journalist Stephanie Brett creates a true-crime podcast focused on the disappearance of Carolyn Russell. By digging deep into this mysterious cold case, her confidence and flagging career are boosted. But after she confronts the suspects--and talks to a potential witness--the leads dry up. Nevertheless, she refuses to let the story rest... Can a small-time journalist with a shoestring podcast really hope to reconstruct the ultimate fate of Carolyn Russell after all these years, or are some secrets best left buried?