Tha Tintin agus a charaidean a’ falbh dhan Charibbean, feuch ulaidh chaillte Ragaim Ruaidh a lorg. Tha iad a’ lorg an t-soithich san robh i – an t-Aon-Adharcach – aig grunnd na mara. Chan eil sgeul air càil, ge-tà, ach ciste de làmh-sgrìobhainnean – a bheir seachad fiosrachadh iongantach!
Tintin and his friends head for the Caribbean in search of pirate Ragam Ruadh's lost treasure, and the ship An Aon-Adharcaich. They find the sunken vessel, but the treasure has vanished. All that remains is a chest full of manuscripts - manuscripts which reveal surprising information!