A Norman invasion of the Gaulish village! But only trendy teenager Justforkix, visiting from Lutetia, fears them, for the Gauls have their magic potion. But the Normas themselves want to learn the meaning of fear: can Asterix and his friends teach them? Another secret weapon is brought into play...and at long last the bard Cacofonix wins the appreciation due to him.

One dark and stormy night, a sinister visitor arrives in the little Gaulish village. Prolix, who claims too be a soothsayer, prophesies that when the storm is over the weather will improve. And it does! Now the credulous villagers believe every word he says, but Asterix has his suspicions of the smooth-talking Prolix. Who is really right about the soothsayer?