In the fall of 2019, a boy and his stepsister go missing; grandparents Larry and Kay Woodcock desperately try to find out what happened to them and why.

Seven-year-old JJ Vallow and 17-year-old Tylee Ryan have been missing for months. Their mother, Lori Vallow, defies a court order to appear in Idaho with her children.

Lori Vallow is extradited from Hawaii to Rexburg, Idaho, to face charges of deserting her missing children, JJ and Tylee. Kay and Larry continue to search for answers and try to remain hopeful, but in the summer of 2020, the case takes a tragic turn.