Another Gaulish chief visits the village and brings a cauldron with money in it so it can be protected. The money is stolen and it's obvious the chief from the other village is behind it.
Asterix and Obelix then try to make money to fill the cauldron but things continually go wrong. They even try to rob bank. Eventually they confront the corrupt chief after taking money from some Romans, and prove that he had arranged everything himself.
Probably the least funny of the entire series.