Sister Hildegard of Bingen was a 12th century nun, a composer of music, a scientist, painter and visionary. Arraigned by her Abbot for harbouring a suspected witch and for her "false" visions, Hildegard was eventually vindicated and founded her own women-only religious community at Bingen on the Rhine. Patricia Routledge plays the multi-talented nun in a dramatic re-creation of Hildegard's heroic career by James Runcie and Nigel Williams.