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...