A bank cleaner, Lola risks losing custody of her two daughters in a difficult divorce, particularly because of her chronic debt. The discovery that a bank broker is engaging in insider trading offers her a unique opportunity to solve her money problems: take advantage of these financial tips to play the stock market. She brings two colleagues into this scam, which will force her to invent a dangerous double life... Overwhelmed by her money problems and the fear of losing custody of her daughters, Lola discovers that Charlant, a broker at the bank where she works as a cleaner, is engaging in insider trading. She convinces her colleague Jess to spy on him in order to take advantage of his tips to make money...

Despite Françoise's complicity in Charlant and Marc's insider trading, Lola drags Jess and Mina into a new masterstroke that boosts her credibility in Marc's eyes. Marc's new proposal scares Jess and Mina, under threat of the bank's internal investigation. Lola, however, has no choice: just days before the judge's hearing, with her lease canceled, she must find money at all costs!