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Professor Donovan is treacherously kidnapped by his former assistant, who demands that he reveal the place where the stone is located, which grants universal power to its owner. Donovan's gr... Read allProfessor Donovan is treacherously kidnapped by his former assistant, who demands that he reveal the place where the stone is located, which grants universal power to its owner. Donovan's granddaughter, along with the chauffeur Simon, go to help the professor. Dangerous encounter... Read allProfessor Donovan is treacherously kidnapped by his former assistant, who demands that he reveal the place where the stone is located, which grants universal power to its owner. Donovan's granddaughter, along with the chauffeur Simon, go to help the professor. Dangerous encounters and exciting adventures await them on the way.