Piety is a hive world in the Drusus Marches of the Calixis Sector. On the Hive World of Piety, vast night-time street parades consisting of tens of millions of individuals take place under glowing argon lights every year to mark the death of Father Faithful, an apocryphal local saint not recognized by the Ecclesiarchy. Every year these parades end in riot and disorder, but they continue for century after century. Piety is known to possess a population of mutants that are regularly and brutually repressed by the Adeptus Arbites.
On the hive world of Piety, the sweltering heat and vast population density seems to trigger nightly outbreaks of horrific violence. Given Piety’s widespread network of powerful local narcolords, its paranoid ruling council of inbred nobles, and a culture of gang wars, it is unsurprising that the local enforcers (known as the Suppressors) are at least as well equipped and armed as a planetary defense regiment, with a full complement of heavy weapons and armored vehicles.