X-Men Unite! From an abandoned oil rig, Magneto, Mystique and Juggernaut prepare to unleash a weapon that will destroy all human life! Cyclops, Jean Grey, Wolverine, Beast and Archangel race to save Storm from their clutches, but first, they'll have to stop the rampaging giant Sentinels programmed to destroy them!

In the late 21st century, a subculture of humans have emerged who have been modified genetically by a vampire-like disease, giving them enhanced speed, incredible stamina and acute intelligence. As they are set apart from "normal" and "healthy" humans, the world is pushed to the brink of worldwide civil war aimed at the destruction of the "diseased" population. In the middle of this crossed-fire is - an infected woman - Ultraviolet, who finds herself protecting a nine-year-old boy who has been marked for death by the human government as he is believed to be a threat to humans.

Four employees of Island Fisheries come to a sun-scorched, isolated island to negotiate fishing rights with the sullen, paranoid islanders who have good reason to be afraid. Soon after the arrival of the four, a mysterious force the islanders thought was chained forever in the dark basement of the foreboding old Counting House is once again on the loose, savagely killing its women. Caught in a power struggle between rival island factions over how to stop the killing, the mainlanders are jailed. They manage to break out, but with a vigilante mob on their heels, can they reach the boat in time? They do, only to confront the mysterious, terrifying force.