One fine cloudy evening, the glass objects start shattering to pieces accompanied by strange phone calls...and then a funny
visitor..and then a hole made by a bullet in Professor Calculus''s hat!!!!
Could this mean that Calculus is in grave danger??But why??Has he made some out-of-the-world discovery that has led him to fall in the hands of his enemies???
Getting a splint of a clue..Tintin and Captain Haddock flies off to Geneva...only to free Calculus from a power struggle between two countries....
Plenty of hints given..but it is my duty to hide the suspense and make you read the
comics...so cant tell anymore about the plot....