In the future, Utopia is finally realized through medical nanotechnology and a strong ethic of social welfare and mutual consideration. Yet this perfect world is not entirely perfect, and three young girls rebel against totalitarian kindness and super-medicine by attempting suicide via starvation. The attempt fails, but one of the girls, Tuan Kirie, grows up to join the World Health Organization. As a crisis threatens the harmony of the new world, Tuan rediscovers another member of her suicide pact, and together they must help save the planet... from itself.