After Obelix single-handedly defeats a new regiment of Romans sent to Totorum (as part of a surprise birthday gift from the other villagers), Caesar is once again pondering what to do with the Gaulish village. A young economist named Preposterous comes up with a novel solution: by introducing "the profit motive" (i.e. capitalism) into the village, he hopes to make the Gauls decadent and complacent enough to avoid causing any trouble, citing Caesar's formerly brilliant but now lazy and fat generals as proof of the effects of wealth. Preposterous then moves to Totorum and spots Obelix in the forest carrying a menhir. Preposterous offers to buy all menhirs Obelix can make, claiming that the richest man in the village also makes him the most influential.
As time goes on, Preposterous keeps increasing the money he gives Obelix as well as convincing him to produce more menhirs, which leads him to start hiring people to help make them as well as to hunt boars to feed them. Obelix's new workload causes him to neglect Dogmatix and Asterix. The latter tries to teach Obelix a lesson by convincing other villagers like Unhygienix and Fulliautomatix to start their own menhir companies. Pretty soon, exactly half the village is producing menhirs while the rest is hunting boars to feed the other half. The only people not caught up in this are Vitalstatistix, Getafix and Asterix, with the latter believing that this will all blow over soon.
Meanwhile back in Rome, Caesar's treasury is being drained and he's stuck with a bunch of menhirs. Preposterous suggests selling them to wealthy Romans, marketing them as symbols of wealth and rank. It seems to be going fine until a Roman businessman starts undercutting the market by making cheaper Roman menhirs. Caesar tries to ban the sale of the latter with no success and soon, the Phoenicians and Egyptians start producing their own menhirs, eventually crashing the market and making them all worthless. Caesar then orders Preposterous to return to Gaul and stop buying the Gaulish menhirs or be thrown to the lions.
Back in Gaul, Obelix is starting to get tired of his life as a businessman and wants things to go back to the way they were. He reconciles with Asterix and they go hunting like they used to. Meanwhile, Preposterous no longer buying the menhirs has naturally angered the rest of the villagers. Despite originally blaiming Obelix, they then blame the Romans and do their thing. With the sestertius having been massively devalued back in Rome thanks to the whole mess, everyone is broke and everything goes back to normal in the village.
* ConspicuousConsumption / ImpossiblyTackyClothes: At the suggestion of Preposterous, Obelix gets some "smarter clothes". Said clothes turn out to be hideously garish. Once the rest of the village is caught up in the craze, all the other menhir entrepreneurs start wearing these hideous clothes as well.
* InsaneTrollLogic: The Roman menhir businessman claims that he can't stop producing menhirs since it would endanger the jobs of hundreds of workers. Once Caesar points out that said "workers" are ''slaves'', he claims "Exactly! The right to work is the only right a slave has. He must not be deprived of it!"
* RunningGag: A character will use economical terms, causing the person he's speaking to to answer "Eh?" in a baffled fashion. The first character will then restate his argument using YouNoTakeCandle speech. Happens notably between Preposterous and Obélix, Obélix and Astérix (with Obélix completely mashing up the economical terms), Preposterous and ''Caesar'', and Getafix and Astérix.
* ShoutOut: A pair of Roman Legionaries who heavily resemble LaurelAndHardy.
* WeirdAlEffect: Believe it or not, Preposterous isn't meant to be a satire of economists in general but of Jacques Chirac. Yes, THAT [[http://en.wikipedia.org/wiki/Jacques_Chirac Jacques Chirac]], during the time when he was still Prime Minister of France.