One day in August, Jane wakes to find her husband and five-year-old son have vanished without a trace. In a single moment, all men - everywhere - have disappeared. As Jane grapples with grief and bewilderment, the world around her scrambles to reshape itself and begins to transform into a kind of feminist utopia. Then Jane discovers something that might bring back the men - but at what cost? What might we be prepared to give up to create a better world?