After numerous sightings of the creature, Maynott fronts an investigation launched by his second-in-command, Pâté. Meanwhile, Lucille, a cabaret singer at the club L'Oiseau Rare and Raoul's childhood friend, is pushed by her aunt Carlotta to marry wealthy Police Commissioner Victor Maynott. Raoul experiments with two potions, one named 'Atomize-a-Tune' and the other 'Super Fertilizer.' An explosion occurs after the two chemicals mix and Emile glimpses a monstrous creature which escapes the laboratory.

In the absence of the Professor who works there, the place is guarded by a proboscis monkey named Charles. In 1910 Paris, shy projectionist Emile Petit travels with his friend Raoul to the Botanical Gardens to make a delivery. Its music was composed by Matthieu Chedid, Sean Lennon and Patrice Renson. It was also produced by Bibo Films, France 3 Cinéma, Walking The Dog, uFilm, uFund, Canal+, France Télévisions, CinéCinéma, Le Tax Shelter du Gouvernement Fédéral de Belgique and Umedia. Many plot elements are drawn from Gaston Leroux's novel The Phantom of the Opera. It was produced by Luc Besson, written by Bergeron and Stéphane Kazandjian, and distributed by EuropaCorp Distribution, and features the voices of Sean Lennon, Vanessa Paradis, Adam Goldberg, Danny Huston, Madeline Zima, Matthew Géczy, Jay Harrington, Catherine O'Hara and Bob Balaban. A Monster in Paris ( French: Un monstre à Paris) is a 2011 French 3D computer-animated musical comedy science fantasy adventure film directed by Bibo Bergeron, and based on a story he wrote.

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