Lupin is the lover of Joan of the Apaches. She is attracted by Paul de Gafilet, nobleman and sculptor. She visits him in his studio and resolves to abandon her underworld career for his sake. Lupin vows revenge but is frustrated by Joan. The latter's affection for Paul turns to rage when she sees him embracing another woman. Joan joins with her confederates to steal some jewels from a statue of the Madonna in a church. She learns that the woman she is jealous of is Paul's sister, attempts to halt the robbery but fails. Paul is injured by the thieves and Joan held captive.