Asterix in Switzerland Album 16

Quaestor Vexatius Sinustitis, who is about to expose the Roman governor's creative accountancy, has been poisoned. Can Getafix brew an antidote? Only if Asterix and Obelix find a certain flower for the druid's potion in Helvetia. What with bank safes, cuckoo hourglasses, yodelling and holes in the cheese, they're soon on a real Helvetian roll.