Watch Plan Delta (1986) Official Trailer

According to director Bob Visser, Plan Delta (from 1983) is a 'time fiction', a film that examines rising sea levels in the future. Around the year 2300, a highly developed and a more primitive culture meet after catastrophic flooding. The former have lost their fertility, the latter have remained virile. Then a primitive woman is kidnapped by the other group to safeguard their future.