![Professor Poopsnagle's Steam Zeppelin](https://image.chilimovie.com/region2/en/300px/20240130/t3hhTqnGrCkExLm0JxAEO8K6dEz.jpg)
Once free, the Doctor and children fly to the island "which is joined by sand". This is part of the cryptogram, and they sight it from the air. When they land, they soon find the salamander and mineral with the help of a metal detector. Successful again, they head for home to decipher the next cryptogram.
After returning to Secret Valley and deciphering the latest cryptogram. Doctor Garcia and the children prepare to search for the Rosy Prize. They know the way they must go, by the predetermined direction on the ancient Torres Parchment.
Together with Dingle, the doctor and children pressed on to discover the third salamander, after climbing down into a deep ravine, behind a waterfall. And surrounding the salamander was the second mineral. Once the Poopmobile had been fixed by Peter, the band took off from the island and headed homeward.
In their search, two of the children were captured by pirates, and Willie Dingle had been flown to the island by Murk to keep an eye on what the children were doing for Count Sator. With great stealth, the doctor was able to free the two children and in turn Willie Dingle was captured by the pirates.
Professor Poopsnagle, the holder of an important scientific mystery, was kidnapped and his mysterious disappearance undermines the world of science. His young grandson, who helps him in research, provides assistance to professor Garcia, a longtime colleague and friend of the scientist. Helped by a group of children spending their holidays in a secret camp in the valley, Professor Garcia and the young boy build a flying bus. They set off in pursuit of the kidnappers and an attempt, at the same time to complete Poopsnagle's unfinished work.