DR. DOOM has captured Pepper, Rhodey and other employees closest to Tony Stark and given him a simple ultimatum — turn over the one weapon Doom needs to destroy the Fantastic Four in four hours, or his friends' lives are forfeit! Iron Man has to sneak into Castle Doom in Latveria undetected and free the hostages before his time is up. So that means only one thing: Time to break out the STEALTH ARMOR!