A late antiquity/early medieval fantasy world is struggling with the collapse of its greatest empire collapsing first into a monarchy and then into a regional power. But as the resurgent Empire of Umprinorous and the newly founded empire known as the Holy Kingdom of Gamschret pick up the pieces, mysterious unidentified flying objects bearing strange green men attack. Can the warring factions unite against the alien menace, or will their rivalries successfully be manipulated and these great fantasy kingdoms taken down, one by one...