Raymond Leblanc

Tintin is sent to guard Professor Calculus, who has invented a machine that can duplicate anything, and is staying in a village near the border of Syldavia and Bodouria. Rastapopoulous, an infamous and ruthless international criminal, tries to lure Calculus and Tintin away by kidnapping two children, who live nearby, in order to get his clutches on the machine.

Here we find a group of misfits who've given up on humanity and have decided to dwell below the pavement. The group has its own hierarchy, of course, and soon the conditions that drove them underground begin to manifest themselves without the influences of the Outside World.