However, Mortadelo and Filemón have to find out to their chagrin that detecting a traitor in an organisation where handling secret documents is a part of every day's work is not as easy as it seems, and they end up running foul of several colleagues, including Ofelia, Professor Bacterio, and - at one point - even each other.
's field losses continue to mount; El Super loses even more of his already fragile patience and subjects Mortadelo and Filemón to a series of gruesome disciplinary actions in order to "dedicate" them to their assignment.
In the end, Mortadelo and Filemón begin to suspect El Super himself, and after some chaotic mishaps during their attempts to expose him, they finally think of asking him about what is done with the secret plans before they are implemented.
encryption department in the building next door, but since he distrusts the internal mail and the phone, he conveys the plans in what he considers a completely fool-proof manner: by leaning out of the window and yelling them, uncoded, across the street.
Angered at having been ordered to clean up this self-inflicted mess, Mortadelo and Filemón lash El Super to a scoop wheel and a piece of cactus to their boss' rear side, marking him as the jackass of the day.