Professor Weismann has disappeared. After arriving in Paris to present his latest invention, the Time Camera, at the Universal Science Congress, Professor Weissmann disappears without a trace. His daughter, Laura, believes he has been kidnapped. Aided by Eustache, the Professor's cat, Laura sets out on the trail of a mysterious sect, whose symbol is 9 elephants. The intrepid duo is confronted by a series of challenges, and each has to draw on their powers of invention and deduction to unravel the plot at the heart of this extraordinary adventure.