Humanity is wiped out in less than two months. Hundreds of strange vessels appear, unleashing an assault both methodical and efficient. Bombardment vaporizes building and bone. Invasion clears out the larger pockets of survivors. Plague finishes the last few clinging to life. Extermination complete, the azure skinned beings journey home and resume their normal lives. Seven hundred years later, a cargo ship goes missing. A burst of static precedes the disappearance, but investigations find no trace of ship or crew. Decades pass. Then another vessel vanishes, again with the burst of static. Another decade. Another disappearance. Never a trace. A rumor begins in the dark alleys and religious communities, spreading like fire. Most laugh when they hear it, dismissing the speaker as superstitious or overly pious; but all tremble inside. In their hearts, they know the genocide was a great crime; and where all of their technology and power has failed to provide answers, the rumor may be true. "Angry Ghosts have come to revenge."