It's about a journalist (hence the stupid name) who assists the police and got "invisibility pills". All his adversaries seem to be uninformed about this fact.
Despite the longevity of the series, like many French comics, it was a very masculine environment, so many GIDs, but very very few DIDs. Most of the time the women or little girls get simply locked into a room. But men or boys captured at the same moment get at least tied up on top.
Anyway, here are the very few DIDs:
