Of all the worlds of the Galaxy, only the Matriarchy of Isis/Cinderella has returned to an ancient social order. It is on Isis that women rule, their control total and unbending. On Isis men are regarded as dangerous animals or, at best, as sexual playthings.
And on Isis the great enigma of the known universe, the Builder Ruins - last remnant of an unknown, ancient culture.
Within those strange Ruins, something survives - something which speaks to the women of Isis and to no one else.