The novel is set in the future, on the fictional planet of Shora, a moon covered by water. The inhabitants of this planet, known as Sharers, are all female. Sharers use genetic engineering to control the ecology of their planet. They are peaceful beings who "share" — that is, they have a spiritual and linguistic union with each other and treat everyone equally. The Sharers take egalitarianism for granted because they share and they lack the concept of "power-over", making their society one in which conflicts are settled without violence. When they are being threatened by an outside power, they resist nonviolently because they refuse to believe in power. Thus, the Sharers can never be subdued by force.