"The Heads of Cerberus" tells of "an alternate-world Philadelphia, reached by a handful of this-world people. This Philadelphia is one in which the political corruptors have become ruthless autocrats, ruling through phony "civic service" competitions which result in cynically brutal enslavement of the people. The name of William Penn has become, under the organizational label of "Penn Service," the very fountainhead of viciously depraved, doctorial government.
