Gaelic version of Yr Ynys Ddu. Tintin and Milik are out walking when they come across two aviators in dire straits ... and that's when our heroes also find themselves up to their neck in it. As the bumbling detectives Parry-Williams and Williams-Parry follow their own noses, Tintin decides to follow Milik's more dependable nose and heads off after international money forgers.