The novel tells the story of Denise Baudu, a 20-year-old woman from Valognes who comes to Paris with her younger brothers and begins working as a saleswoman at the department store "Au Bonheur des Dames". Zola describes the inner workings of the store from the employees' perspective, including the 13-hour workdays, the substandard food and the bare lodgings for the female staff. Many of the conflicts in the novel spring from each employee's struggle for advancement and the malicious infighting and gossip among the staff.