Tintin and his faithful dog 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 Bray and Brea follow their own noses, Tintin decides to follow Milik's more dependable nose and heads off after a bunch of international money forgers. Amongst them is Dr Müller, soon to be one of Tintin's most ruthless enemies. Escaping with his life after being shot, Tintin faces further close calls as he unearths clues which lead him to the furthermost isles of Scotland. This is where he discovers the dark legend of the monster Goedhvil, incarcerated within the ruins of a' Chreag Dubh castle on the Ynys Dhu (Black Isle). Ignoring any monstrous legends, Tintin and Milik take a boat to the island to challenge the legend that lies ahead…