A Gathering of Angels
Council was called in Heaven. Even the Archangels who had forsaken the Divine City and its celestial politicking were humbly asked to attend and give counsel. The Archangels, the most power beings in Creation, faced the unknown for the first time since the cleansing of the Dream Marches; this worried them. When the bright doors of the Council Room finally opened, the Most High of the Divine Hosts called unto them their servants and warriors. To Las Vegas were they dispatched, to find the reason for the disappearance of so many Celestials, and the source of the Shout. As the Archangels sit in their heavenly towers, their servants speed down to face the unknown threat.
And you are one of these servants, an Angel of God.