Apparently their city seems to have acquired some sort of superhero.
Like, a Batman in Gotham City. Only they're not in Gotham City, and no one knows what this guy is actually called.
He just shows up, kicks ass, fights crime, rescues people from falling buildings and burning houses and helping little old ladies cross the street.
Oh, and he also exposes the corrupt dealings of government officials while he's at it. And he apparently has like, blonde hair or something. That's what all the eyewitnesses said.
It's so absurd and so out of a comic book that Grantaire wants to laugh.
"Hey R, when the cops asked you what happened, you didn't by any chance accidentally call the superhero 'Blondie', did you?"