In October 2012, a wilderness instructor named Thomas Seibold walked into the wilds of Gates of The Arctic National Park & Preserve in Alaska and disappeared without a trace. No sign of him as ever been found.

The story of 5 people who disappeared under strange circumstances in Alaska.

Reflections on what's been learned about Erin Gilbert's case, and a final conversation with her sister, Stephanie.

Evan tries to tie up loose ends, but many questions remain.

Taking a closer look at the days and weeks after Erin disappeared, Evan talks to family members, eye-witnesses, and an Alaskan search and rescue professional.

Curious about the investigations that took place after Erin Gilbert disappeared, Evan interviews a retired Alaska State Trooper, who also happens to be the lone investigator for the venerable Cold Case Unit.

New questions emerge when Evan takes a closer look at the details surrounding Erin Gilbert's disappearance from the Girdwood Forest Fair on July 1, 1995.

Hoping to learn more about who Erin Gilbert was as a person, Evan reaches out to some of Erin Gilbert's closest friends from childhood and high school.

An Alaskan podcaster begins looking into the unsolved 1995 disappearance of Erin Gilbert.