On a grueling 222-mile hike through California’s Sierra Nevada, Laurie Singer faced a terrifying ordeal — she was abandoned, miles from help, with no one to rely on but herself.

In 2016, the avid hiker and adrenaline junkie set out to tackle the John Muir Trail, one of America’s most famous backpacking routes, with her close friend and longtime training partner, John, with whom she had the utmost trust.

But what was supposed to be an empowering, life-changing experience for the friends turned into something straight out of an episode of “Dateline.”