Madeleine Vernier, a renowned actress, is soon to perform a play written by her second husband, Gilbert Renaud. Her previous husband, Raymond, shows up and reveals to the young woman that the play is a transposition of a crime that Gilbert has always managed to hide. Disturbed and frightened, Madeleine regains her affection for Raymond, who is delighted, but mysteriously dies. The actress and author would have everything to fear from the police if Maguy, the couple's false friend, were the culprit. The curtain can finally be lifted.

Tongues start to wag after a famous Parisian music hall dancer is rushed to hospital after being found poisoned by arsenic at the Concert Mayol.

Released from prison, Arlette returns to her job as a cabaret star. The police try to get her to confess where the stolen jewels are hidden.