When genius scientist Professor Roche (Ernest Navara) and his aide, Simon Hart (Louis Tock), are abducted by pirates, the professor doesn't understand the gravity of the situation. But Simon realizes that the pirates want to use Roche's newest invention -- a strong explosive -- for world domination. With Roche isolated, Simon tries to thwart the plans of pirate captain Artigas (Milo Holl) by sending a balloon with a message to the outside. Little does he know, Roche has a clever plan of his own.
The Fabulous World of Jules Verne