With his goal of nuclear Armageddon close at hand, the Mutant Master monitors the X-Men. Cyclops and Iceman were stopped in America fighting the US military in an attempt to stop a gas attack, while Beast, Marvel Girl and Angel are held prisoner in a Russian prison when attempting to stop a bomb plot.

In the States, Cyclops and Iceman fight their way through the military opposition to enter the building where the nerve gas has been planted. Deducing that it has been put into the ventilation system, Cyclops orders Iceman to freeze it solid, preventing the gas from being released. However, they are attacked by Mastermind and Unus, who catch them off guard. While in Russia, Marvel Girl uses her telekinetic powers to pull one of the guards close enough to their cell for Beast to knock him out and take his keys. Freeing themselves the X-Men disrupt a meeting of Russian military officials in order to stop a bomb planted in their meeting table, however the Blob (who was also in the same cell as them) has revived and appeared to oppose the X-Men from succeeding in their task.

Back in the States, Cyclops and Iceman continue to battle Unus and Mastermind.

---