This time, the "exterminators" must confront a secret organization conducting a diabolical experiment: transforming a fighter into an indestructible man through a series of bionic implants. To investigate their scheme, Colonel Morris assigns Guillermo and Héctor Echavarria, but they are joined by Nico, an orphaned boy eager to become part of the Eagle Command.

Following the events (and disasters) at the end of their previous adventure, Alberto and Jorge are severely reprimanded. However, just when the recruits' fate seemed destined for the brig, a direct call from the Lieutenant General saves them from punishment... though to do so, they must prove themselves in a new training environment for their first special mission.