Years ago, just before the country was incinerated to wasteland, ten men and their families colonized an island off the coast. They built a radical society of ancestor 

The daughters of these men are wives-in-training. At the first sign of puberty, they face their Summer of Fruition, a ritualistic season that drags them from adolescence to matrimony. They have children, who have children, and when they are no longer useful, they take their final draught and die. But in the summer, the younger children reign supreme. With the adults indoors and the pubescent in Fruition, the children live wildly--they fight over food and shelter, free of their fathers' hands and their mothers' despair. And it is at the end of one summer that little Caitlin Jacob sees something so horrifying, so contradictory to the laws of the island, that she must share it with the others.