Class is back in session as Generation X returns! First, a recruiting trip to Manhattan turns fatal when the Morlock terrorists Gene Nation target Emma Frost! Then, the school gains a new student in the laid-back Mondo ... but what does the all-new Hellfire Club want with him? And what does Emma's long-lost sister have to do with their plan? The Gen X kids barely have time to welcome Mondo into the fold before they're targeted by Omega Red?