The heroine of the novel, Nina Kornilina, receives an invitation from the owners of a Parisian gallery to come and present at an exhibition the work of her husband Arthur Kornilina, who died under strange circumstances. Re-reading the artist's diaries, Nina begins to suspect with horror that Arthur was developing mental illness before his death. She found the “vision of the Rose” especially scary; that’s what she called to herself the sketch of the future painting “Magic” with a black rose in the center. Before her death, Nina sees in a dream a Black man who was also pursuing her husband. And this is not the last murder. All the crimes are mysteriously connected with the mystery of the Florentine medallion, which was made by a famous medieval jeweler and alchemist as a gift to his beloved. The novel is being published in a new edition. Previously, the novel was published under the title “Black Rose.”