In "Diva," Jules, an aspiring young postman in Paris, captures a live performance by his beloved opera singer, Cynthia Hawkins, on tape. His life takes a dangerous turn when he encounters a woman being chased by armed assailants. In a frantic moment before her demise, she entrusts him with an audio cassette, which he unknowingly becomes entangled with. This chance encounter thrusts Jules into a perilous world, intertwining his admiration for art with the dark undercurrents of crime.