Driftwood (movie, 1997)

When Sarah walks alone along the desolate beach one day she find an unconscious man, who has been brought to land by the waves. When he awakens he doesn't remember anything. He has no name and no past. His dependence lies on Sarah. A role that makes her forget her loneliness and she decides to therefore lie about their situation... She says that they are situated on an island, where no one can reach them. From now, his life lies in her hands.