The preparations for the fifth holy grail war were going smoothly. However something is amiss. An entity from another world has appeared and covets the grail for itself. What is the fate of the masters now? Especially the one who summoned it?

An idea in the "What if Shirou was raised in...?" thread born when TheSpy, Heroslayer and myself were talking about a Shirou raised in Disgaea-verse Makai. Originally posted in Beast's Lair. Word count's wrong, not sure why.