When bored courtesan Zelie de Chaumet begs her lover, the corrupt and powerful Stetz, to take her slumming, the pair encounter Pierre Boucheron, alias 'The Rat' , boy-king of the Paris underworld, and the innocent Odile. Love, life and jewels are risked and lost in this powerful romantic melodrama as the four characters' lives are changed by this chance encounter for ever.
| Directing | Graham Cutts | Director |
| Writing | Ivor Novello | Writer |
| Art | C. Wilfred Arnold | Art Direction |
| Writing | Constance Collier | Writer |
| Production | Michael Balcon | Producer |
| Writing | Graham Cutts | Writer |
| Directing | Renie Morrison | Script Supervisor |
| Camera | Hal Young | Director of Photography |