The Subtleties That Make Mass Murderers Out of Otherwise Decent Beings

Fall of 1979. The Marauders have been out of Hogwarts for a year and have joined the Order. Dumbledore has a mission for Sirius: re-enter pure-blooded society and infiltrate Voldemort's inner circle. Dumbledore insists that any costs are an acceptable loss for the greater good of the cause. But once blood has been spilled, no amount of crying can wash the red from his guilty hands.