Lucie Gélinas was 21 and studying preschool education at the University of Trois-Rivières when she set out on a cross-country hitchhiking trip on April 23, 1973. Her father drove Lucie and her friend Guy Carignan to the Couronne roundabout in Trois-Rivières that morning; they planned to travel to Vancouver by hitchhiking. Lucie had long brown hair, greenish-blue eyes, a scar on her abdomen from previous liver surgery, and slightly protruding upper teeth.

That morning was the last time Lucie’s family saw her. Neither she nor Guy ever made contact, and there has been no known financial activity or verifiable trace of either traveler since they left the roundabout. Investigations were opened and the case has remained unresolved, with no concrete evidence reported to explain their disappearance.