Ganymede (Future History Darkships -- St. Lucia of The Spaceways)

A short story by award winning author Sarah A. Hoyt.

Bio engineered humans have been massacred all over the solar system. Now the madness has come to forsaken Ganymede, last refuge of the desperate. There, Sister Mary Magdalen, a woman who escaped the horrors of her past life by professing with the nuns of St. Lucia of The Spaceways must decide who is human, who is now, who lives and who dies.