Dr. Denwell is a research professor who takes his experiments a bit too personally. After drinking a mysterious potion from India himself, he turns completely invisible. At that same time, an unknown evil steals another experiment called only "Formula D" from the lab - and plans to use it to take over and destroy the world. The fate of mankind depends on the power of the professor's invisibility against the forces of darkness. Co-stars Dylan the shaggy dog for more fantasy-comedy entertainment. With Philippe Leroy, Gastone Moschin, Ingeborg Schöner. 91 min. Standard; Soundtrack: English (dubbed). Dubbed in English.