Four years after the Summit Meadow case went cold, hikers found a human skull. There's no proof it's related to the hand discovered earlier, but it allows for a facial reconstruction that shows what Jane Doe may have looked like. But that generates no leads. Decades pass; Kim Tucker's son Cullen is now an investigator and is assigned the case. Using new DNA science after almost 40 years, Jane Doe is finally identified! Now Cullen wonders how did she end up dead in Yosemite — and given it was likely murder, who did it?