Tokyo, autumn, second decade of the 21st century. The hands of the young and very famous dancer Noriko Aya appear in the small anti-seismic space between two buildings near the gardens of the Imperial Palace and the hotel where the marriage formed by the Black novel author Olivia Galván and Professor of Comparative Literature César Andrade, invited by the university to participate in a postgraduate course.With them, a mysterious clue: a diamond and ruby ring, which will soon point to César as the main suspect. of the crime. Told in the first person by Olivia Galván, who will take refuge in her incipient friendship with the diplomat Gonzalo Marcos, advisor to the Spanish Embassy in Japan, the action of the novel recounts the course of the investigation of Noriko's murder and focuses on demonstrating that Often, nothing is what it seems.