Sister of Silence (Audio Drama)

Sister of Silence is the fourth audio drama for the Horus Heresy Series that was not originally released as part of an anthology or other release. Sister of Silence was released by the Black Library on April 1st, 2012 and the download was limited to those readers who subscribed to the Black Library's newsletter. Released as an April Fool's gag, after a brief introduction there is nothing but silence that follows for thirteen full minutes.

Official Synopsis
This audio drama has no official story synopsis, because it has no story.