As Manhattan burns, S'ym, N'astirh and the Goblin Queen fan the flames! But the manipulative Mister Sinister may be the most incendiary threat of all! Madelyne Pryor's secrets are revealed, while Colossus and the New Mutants learn the truth about Illyana Rasputin! While X-Factor hunts Cyclops's baby son, Excalibur is drawn into the fray! One by one, his teammates fall, but Longshot's luck holds out - will anyone else survive to join him in a last stand against Sinister? Meanwhile, Power Pack and Cloak & Dagger struggle with demons of their own! Collecting UNCANNY X-MEN (1981) #241-243, EXCALIBUR (1988) #6-7, X-FACTOR (1986) #37-40, NEW MUTANTS (1983) #73, CLOAK & DAGGER (1988) #4, POWER PACK (1984) #44 and material from X-FACTOR ANNUAL #4.