A fall during the picking of mistletoe led Druid Getafix to make a decision: he will travel through Gaul with Asterix, Obelix and Pectin in search of a young talented druide to guarantee the future of the village. He must indeed find the one who will take his suite and to whom he will transmit the Secret of the Magic Potion. Sulfurix, an evil druid, intends to take advantage to steal this secret ...