Jean Van Hamme

A murder is committed in the building where Aurélia Maudru, inspector of the judicial police in charge of the investigation, lives.

Jules, a young Parisian postman, secretly records a concert performance given by the opera singer Cynthia Hawkins, whom he idolises. The following day, Jules runs into a woman who is being pursued by armed thugs. Before she is killed, the woman slips an audio cassette into his mail bag...