
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.
Eugène Ballanchon, scientific researcher, single

Régine, Mr. Beauchard's spy

Mr. Beauchard, executive secretary linked to a gang

Mr. Granger, director of the scientific laboratory

DST inspector

Father Ballanchon

Mrs. Ballanchon, Eugène's mother

Merchant, spy in the laboratory

Mario

Scholar

Baron

DST inspector

Agent

Fred

Baroness

Pedestrian

Extra worker (uncredited)
Jo (uncredited)

Actor from the western (uncredited)

Police officer (uncredited)

Actor from the western (uncredited)

Minister (uncredited)

Traveler (uncredited)

Actor from the western (uncredited)
