Season 5 of The Fine Line begins: On the calm evening of September 5, 2020, two mountain bikers set off to ride the technical Phillips Canyon trail off Teton Pass. About halfway into the ride, they approached the second of three log bridge crossings. One rider made it across. The other lost her balance and fell off the side of the bridge into the cold creek below. Unable to walk, in severe pain, and with hypothermia setting in as darkness fell, the biker was in for a long night.