This is a real event. The death of the actress Elizabeth Sauter, known as "black dahlia", once left the LAPD with a headache and tried its best to help solve the case. It's not because Elizabeth Soter is famous, but because the murder case is so bloody and horrible that the residents of the whole United States, especially Los Angeles, are in a state of panic. As long as this cruel murderer is not caught, the residents, especially the female residents, will be restless. Ironically, Elizabeth Soter, who never caught the audience's attention in her performance, became tens of thousands of times more famous after her death than before.

However, in the following investigation, Elizabeth Soter, the "black dahlia", became famous. The LAPD spent three years investigating this case, and hundreds of people were investigated before and after. During this period, many people turned themselves in and claimed to be the "flower-destroying culprit". However, after investigation, no one was the real murderer. It took several years, but the police found nothing. The murderer of Elizabeth Soter disappeared like air, and has not been found until today. Therefore, this "flower-destroying madman" has become the same "celebrity" as "Jack the Ripper".

Brian De Palma has been paying attention to this case. This famous director, known as Hitchcock in contemporary America, was a 7-year-old child when the Dahlia murder shocked the United States. Since then, he has been impressed by this incident. This child, who played in his father's plastic surgery hospital since childhood, is particularly interested in bloody crime movies. He has successively established his position as a master of crime movies with films such as Scarface, Dawn of the Lover, Snake Eyes, Mission Impossible, and Beauty of the Snake. This time, he teamed up with james ellroy, the author of the novel black dahlia: The True Story, to create black dahlia, which is viewed from a contemporary perspective.