In issue #158 Storms and Wolverine go about breaking into the Pentagon to delete all the files that the military has about the X-Men. They do this because Ms. Marvel has been hanging out with them and happens to have the credentials to get them in the door. This is also the type of plot you get when your writer, in this case Chris Claremont, is writing two different comic series at the same time and wants a crossover.
While in the Pentagon, Wolvie and Storm wind up throwing down with both Rogue and Mystique, who are independently getting into trouble there. It’s just a weird series of events, and I think it ended with Ms. Marvel deleting some of the information that the Pentagon had on her.
You read that right…Dracula.
The X-Men race to find a cure but aren’t successful. There is lots of fighting with the new and vampire improved Storm, who royally kicks the crap out of them.
Then in a weird twist of niceness, Dracula shows that he isn’t really that bad of a guy and returns her to her normal form. Total waste of an issue.