In idee fixe you play street wise people trying to survive (and earn money) in damaged, demolished by wars totalitarian controlled world in the half of the XXI century. Action take place in Poland - country of absurd, dirt, extreme catholicism, on the front line between East and West. Idee fixe is a world seamingly ordered, but really is really controoled by invisible powers by another drastic change, maybe even catastrophic.
In idee fixe there are mixed three main elements: technototalitarism, conspiracy theories and polish, local dirt. Proportions between the three are up to Game Master
for Polish description
see the RPG entry