The six survivors of a shipwreck - five men and one woman - are marooned on a desert island. They soon get used to living on the island but it becomes clear that sexual frustration is becoming the biggest problem. The six agree on a system: each man will marry the woman for a week at a time so the men get to have sex every fifth week, and the woman gets to have different partners. The routine works fine for a couple of years, but then the woman dies. The men are left in a tricky position: the first week is hard, the second pretty bad, the third very bad, the fourth week is awful and the fifth absolutely appalling. So, on the sixth week, they bury her.