Melodramatic war drama based on a novel by M.A. Bernière, directed by M. Pouctal, conceived as popular propaganda. When it turns out that plant director M. Dalibert has suddenly disappeared, Chantecoq is charged with the investigation. Through creative means he succeeds to unravel the case, involving two German spies looking for a secret recipe for a new French weapon of war.

The Phono-Cinéma-Théâtre was a special pavilion at the 1900 Paris World's Fair which featured filmed performances presented with sound via wax cylinder recordings. Many of these short films were also presented in hand-tinted color. The performances ranged from theatre (Coquelin the eldest, Gabrielle Réjane, Sarah Bernhardt, Félicia Mallet), opera & operetta (Mariette Sully, Emile Cossira, Jeanne Hatto, Mily-Meyer, Désiré Pougaud), to café concert & music hall variety (Footit et Chocolat, Mason and Forbes, Little Tich, Brunin, Polin, Jules Moy) and dance (Blanche and Louise Mante from the Paris Opera, Carlotta Zambelli, Michel Vasquez, Rosita Mauri, Jeanne Chasles, Achille Viscusi, Christine Kerf, Cléo de Mérode).