Five young men drove into the Sierra Nevada one February night in 1978—and never came home. Their car was found abandoned, in working order, on a snow-choked road miles from where they were supposed to be. Months later, their bodies surfaced under bizarre and haunting circumstances, with one man still missing to this day. Was it a tragic accident, a sinister plot, or something stranger? Tonight, we unravel the enduring mystery of the Yuba County Five.