Denis, a poor student in philosophy, works as a night porter in the Paris market of Les Halles in order to pay for his studies. Constantly weary, he falls asleep and dreams of a beautiful girl in white, Irène, with whom he falls in love.
| Actor | Role |
|---|---|
 Fernand GraveyDenis | Denis |
 Micheline PresleIrène | Irène |
 Saturnin FabreProfessor Thalès | Professor Thalès |
 Charles GranvalAdalbert, blind man | Adalbert, blind man |
 Bernard BlierLucien | Lucien |
 Marcel LévesqueDoctor Le Tellier | Doctor Le Tellier |
| CChristiane NèreNina | Nina |
 Jean ParédèsCadet | Cadet |
| ZZita FioreAssistant | Assistant |
 Michel VitoldBoris | Boris |
| RRoger Caccia'Le fou-pendule' | 'Le fou-pendule' |
 Paul FrankeurBoss of the bistro | Boss of the bistro |
 Marguerite DucouretMarket gardener | Market gardener |
 André NicolleConservative | Conservative |
 Maurice MarceauOne of the "forts des Halles" | One of the "forts des Halles" |
 Maurice SalabertOne of the "forts des Halles" | One of the "forts des Halles" |
 Géo ForsterDiner | Diner |
 Roger VincentGuest | Guest |
 Maurice SchutzOld man | Old man |
 Marguerite de MorlayeGuest | Guest |
 Joé DavrayNina's friend | Nina's friend |
| HHenry GerrarNot listed | Not listed |
 Eugène YvernèsNot listed | Not listed |