Enola Holmes knows it’s no coincidence that her name spelled backwards is alone. Her mother is a free-spirited feminist who loves codes and ciphers but never paid much attention to her daughter. When Mum disappeared on Enola’s 14th birthday in The Case of the Missing Marquess, Enola wasn’t surprised to eventually discover Mum left of her own free will.
Enola contacted her much older brothers, Sherlock and Mycroft, for help. When she learned that they planned to send her to finishing school, Enola took a cue from Mum and ran away. She fled to London, where she used various disguises and made herself look older. She opened her own agency to help find lost people. She created an imaginary employer, Dr. Leslie T. Ragostin, and posed as Ivy Meshle, his nondescript assistant.
In The Case of the Bizarre Bouquets, Dr. Watson has been mistakenly imprisoned in an insane asylum. Enola is hiding out in London for fear her brothers have discovered her alternate identity. Despite her evasiveness, Enola adores and admires Sherlock. When she learns his assistant has gone missing, she vows to solve the mystery.
Enola visits Mrs. Watson posing as an attractive gentlewoman named Viola Everseau. At the Watson home, Enola notices a strange bouquet presumably sent by a patient. She and her mother are students of flowers and their meanings, so she knows these particular varieties carry ominous symbolism. She traces the bouquet back to a costume shop. The owner, Pertelote, has an insane and disfigured sister, Flora, who sometimes disguises herself as a man and causes trouble.
Enola rents a room across from the shop so she can watch the women. She overhears that Flora was disfigured very young. When Pertelote failed to babysit her effectively, Flora’s face was eaten off by rats. Enola learns Dr. Watson signed off on Flora’s admission to the insane asylum. The sisters almost catch Enola spying on them. She flees and hurts herself in the process.
Enola realizes Flora tricked the asylum staff into capturing Dr. Watson and admitting him under the name of the brother-in-law she murdered. Enola posts a message in the paper for Sherlock, telling him where to rescue Watson. After Watson is free, Sherlock and Mycroft send Enola a note of gratitude in the paper. Enola realizes they haven’t figured out her secret identity as Ivy Meshle, so she’s thrilled to be able to restart her agency.