Book 8 in a series for young readers that combines adventure and humour. Jim and his friends have gone sailing in search of the fabulous Three Prices Treasure, which no pirate has ever managed to lay hands on. The only way to discover where to find it is following the diary of Captain Barracuda. Unfortunately, by the students at the school of pirates (Lobitos de mar) fault, the diary has just turned into a pile of ashes... And the search is in danger of becoming smoke!