This talkative and unevenly paced feature finds Fou (Jean Lefebvre) the inventor of a gas that makes the users fall in love. He is chased by his boss, the police, and spies, who seek to secure the secret recipe for their own selfish purposes. A shadowy American underworld figure tries to intimidate the inventor. A half-hearted attempt at comedy tries to go along with the double dealing and trickery of the thin plot of the film.
as Eugène Ballanchon, scientific researcher, single
as Régine, Mr. Beauchard's spy
as Mr. Beauchard, executive secretary linked to a gang
as Mr. Granger, director of the scientific laboratory
as DST inspector
as Father Ballanchon
as Mrs. Ballanchon, Eugène's mother
as Merchant, spy in the laboratory
as Mario
as Scholar
as Baron
as DST inspector
as Agent
as Fred
as Baroness
as Pedestrian
as Extra worker (uncredited)
as Jo (uncredited)
as Actor from the western (uncredited)
as Police officer (uncredited)
as Actor from the western (uncredited)
as Minister (uncredited)
as Traveler (uncredited)
as Actor from the western (uncredited)
