The film portrays the events on the day King Henri III of France arranged for Duke Henri de Guise to be murdered.
| Actor | Role |
|---|---|
 Charles le BargyHenri III | Henri III |
 Albert LambertLe duc de Guise | Le duc de Guise |
 Gabrielle RobinneMarquise de Noirmoutier, maîtresse du duc | Marquise de Noirmoutier, maîtresse du duc |
 Berthe BovyLe page | Le page |
 Jean AngeloNot listed | Not listed |
 Albert DieudonnéNot listed | Not listed |
 Huguette DuflosNot listed | Not listed |
 Raphaël DuflosNot listed | Not listed |
| CCharles LorrainNot listed | Not listed |
 Rolla NormanNot listed | Not listed |