Nightmares and daydreams! When D'Spayre targets Generation X, can Chamber overcome his inner darkness? Then, Black Tom Cassidy attacks... with a secret weapon the team won't see coming! Meanwhile, Bastion has launched Operation: Zero Tolerance - and while Jubilee struggles to escape his manipulative clutches, Gen X faces the threat of the elements, the fury of the Sentinels... and the sting of betrayal! What horrible line will Emma Frost cross to ensure her students' safety?