As the poet, Prunier, speaks of romance and love, Magda, a prostitute, reminisces about her past. She soon realizes that as the mistress of Rambaldo, she is living without love. That night, she dresses up as a working class woman and goes off to the Bullier nightclub. There, she falls in love with a young man, Ruggero, and decides to leave Rambaldo. Things are going well with the couple until Ruggero surprises Magda, with a proposition of marriage. Magda is then forced to tell the young man about her immoral past. In the end, she feels she must leave Ruggero and leaves him sobbing.