Publisher's Synopsis
Hergé's comment on Cold War tensions sees Prof Ephraim R Efflwfia attract attention from rival states Brodwria and Syldafia. Both sides want to adapt the Professor's latest invention into a deadly weapon. This leads to Efflwfia's kidnap spurring Tintin and Hadog to ensure his freedom, but will Efflwfia realise his inventiveness has gone too far?