Madeleine Valdan very successfully played the role of a brilliant courtesan, while in reality being in the secret service of the crown. But finding herself out of work, the girl was left without funds. And then Madeleine decides to take a desperate step - she is ready to sell her virginity at auction to the most generous buyer. However, this crazy idea unexpectedly brings Madeleine closer to private detective Gabriel Huntford, the man she asked to make inquiries about potential clients. Gabriel passionately falls in love with the beauty, and she is ready to reciprocate, abandoning her intentions, but a mysterious enemy follows on the heels of the lovers...