The answer to that is provided by the first word in the first panel of the first page. "MYSTIQUE:". She's only the second named character to narrate Uncanny, and a villain, at that! Still, it gets it out of the way quickly, and Kitty Pryde is lying on the floor, bleeding with a fake-Wolverine standing over her on the third page. The other X-Men attack, one by one (Colossus, Cyclops, Storm, Rogue and Nightcrawler), and Mystique is defeated. She then wakes up in her apartment, as another rug is pulled from under us: all of that was a fake-out, a Murderworld simulation. Mystique wants to get Rogue, who she basically considers her daughter, back. And she's pulling her blows against Nightcrawler, for some reason. At this point Mystique's narration abruptly stops, because of the point-of-view shift to the X-Men.
'Crawler is concerned about his relationship to her, on account of both being blue and him being a foundling. Ask Margali Szardos (his adoptive mother), she said. [Did this actually happen in a comic - I suppose Days of Future Past or the one in the Pentagon?] Mystique and the Brotherhood set an ambush for a few of the X-Men, who are attending a ballet.
The ambush - of Kitty and Peter and Kurt and Amanda is a bit of a disaster for everyone involved, and Kitty gets word out to Xavier, who sends Storm and Wolverine, but leaves Rogue on the bench. Peter is taken out of action by supercooling. Reed Richards might be able to help but is out, so she just goes and breaks into (or rather, phases through) the Baxter Building, and nicks a bit of equipment to restore Colossus back to normal. The X-Men quickly take down Pyro, Avalanche, Blob and... oh that's it. Crap.
Meanwhile, back at the mansion, Mystique shoots Professor Xavier, and tries to talk Rogue into coming back with her. She's convinced that she only left because of Xavier's mindcontrol - which is half-right - it was Mastermind. This relationship with Mystique, who took in a young Rogue before she became a mutant, is at the heart of the issue, and it can more than withstand the weight.
Mystique offers a truce, and an exchange of prisoners, which has never happened before and suggests an interesting new course, never really taken, of her Brotherhood and the X-Men having a more ambiguous relationship. But in all this confusion, Kitty Pryde has been lost, and is found having fallen from a building, with the technogadget smashed to bits.