Space ranger Erinnia Bestshot failed to save the only race living on the Moon after being trapped in a time maze for four years.  She returns to Earth to find she has been replaced by five versions of herself brought over from parallel universes.  Can you say long vacation?  Not Erinnia.  The best medicine is a mission to Venus to fend off a new alien attack away from a besieged human city.  Only where did these aliens come from?  Guilt and innocence is muddy.  Just like Venus.