Winter Soldier Bucky Barnes and the Black Widow have made contact with Doctor Doom and have warned him about Lucia von Bardas’ plot to wreak havoc with her stolen Doombot. Doom traces the Doombot’s whereabouts to the United Nations Building. Doom and Bucky fly to the scene in one of the dictator’s special aircraft while the Black Widow rides off to locate the Red Ghost, following a lead from Nick Fury. At the UN, Project Zephyr sleeper agent Arkady has accompanied the robot impostor into the Latverian offices and murdered the staff. A sudden trembling in the air gives way to the real Doom’s craft bursting through the wall. As Doom takes on his unstable duplicate, Bucky pursues the fleeing Arkady through the building with only the Winter Soldier trying to avoid harming any innocent bystanders. Finally Bucky corners his quarry on a balcony and the two crack Soviet killers fight it out. Arkady seizes Bucky’s pistol but it has a sensor so that it only works for Bucky. The pistol explodes with the unintended result that Arkady is fatally wounded. As he is dying he explains that the plot was for him to attack the Doombot as a distraction for von Bardas’ next step—but she got what she needed from the robot. Bucky turns on Doctor Doom and asks "What else did you program those things for?"
Meanwhile, Black Widow has arrived at the site of the Red Ghost’s secret lab but finds the place has recently been vacated….
In the Latverian Alps, Lucia von Bardas, the Red Ghost, and Dmitri, the remaining Zephyr agent, invade one of Doom’s missile bases. They kill everyone in the place since von Bardas already has Doom’s launch codes….