The Highway Crossing (1999)

Surprised by rain and sudden darkness Laura and Roland, a young couple hitch-hiking on an empty road, decide to seek shelter at a nearby country house. Osvald, the owner, seems to know the deeper meaning of their unexpected visit. His strange behaviour leads to an equally strange offer: Osvald wants to buy Roland's wife. Laura and Roland start to play along, only to discover that their host is not kidding.