Lt. Anna-Louise Bach and her partner Jorge Weil are police officers in New Dresden, a domed city on the Moon. They are assigned what initially seems an open-and-shut case of murder, but are dismayed to realize that the crime took place in an area of the city inhabited by a cult called the Barbies. The Barbies have altered themselves into identical women under the order of their church's leader. They have had their genitals removed and have abandoned names and individual identities, save for tattooed ID numbers forced on them by law. All Barbies being identical, no identification of the murderer is possible.
