Collects Knights Of X #1-5. The gates to Otherworld are closed, and Captain Britain is trapped on the wrong side! Usurpers Merlyn and King Arthur are now in control of the Lunatic Citadel. Furies the size of Sentinels raze villages in their hunt for the witchbreed. Bloodthirsty vampires roam. Cut off from Krakoa, Betsy Braddock is Otherworld's only hero - and to save her people, she must recruit a roundtable of her own! Ten Knights of X will set out on a dangerous quest, but not all will make it to the end. Can those who survive locate the holy grail of mutantkind? The fate of Otherworld lies at the center of Krakoa's future!