Four friends decide to walk down the Grote Routepad number 5 as a tribute and memory of their mutual friend Lisa. It disappeared without a trace five years ago when she followed the same walking route on her own, 2000 kilometers long from the North Sea to Nice. What happened to her? Did she have an accident? Did she take her own life? Or was something done to her? It has never been clarified. Michiel, Zoë, Ylena and Asim hope to gain more clarity along the GR5.