Antonio Margheriti directs this off-the-wall Italian farce about a research professor who samples the mysterious elixir he receives from a colleague and discovers that it turns him invisible! When an unidentified villain steals the formula with plans for world domination, the good doctor must fight back with his own remaining powers of invisibility.
Research professor, Dr. Denwell, receives a mysterious potion from a colleague residing in Bombay. Imagine his surprise when, after the sampling the formula, he becomes totally invisible. In the meantime, a sinister force of evil steals a secret formula, called Formula D, from the institute. With Formula D in their hands, the power hungry villains now have the necessary weapon needed to rule the world. With the fat of mankind in his hands, Dr. Denwell (and his trusty sheepdog, Dylan) use the exotic disappearing formula to launch an invincible and invisible attack against the evil conspirators. You've never seen an action-comedy like this!