When a woman fatally falls from El Capitan, special agent Kyle Turner suspects it wasn't an accident — and that the truth may lie deep within Yosemite.

Jane Doe's identity raises new questions about the life she left behind — and connects to an old case that has haunted Turner for years.

A grim discovery in the mines makes Turner question the squatters' role in the case. Vasquez fights to protect her son when his father reappears.

Turner takes the investigation to new extremes — with serious repercussions. Jill gets caught up in Vasquez's conflict with her ex.

As the investigation comes to a close, Turner discovers the truth about Lucy's death — and the long-buried secrets that set it in motion.