Loop on the boulder marked "I", along the blue path, 250m above La Roche d'Hercule. Start in the middle of the roof at a step, low traverse to the left, climb the left arete and then the ledge as for Idiotie, pass the exit angle of Rince-Mi, continue to traverse to the right with top holds, downclimb on rather fragile holds low traverse to the left for 1m50 and exit in Idée Fixe.