1907 London is rocked by a series of murders. Someone is killing young girls and creating installations in the form of flowers from their bodies. The police are powerless, and the great detective Sherlock Holmes died sixteen years ago. Inspector Greg Lestrade turns for help to the only person who, in his opinion, is able to stop the fanatic. This man's name is John Hamish Watson. In pursuit of the Gardener, the doctor will plunge to the bottom of London. The streets await him, where hungry children offer themselves to perverts; the fishy docks of Soho; Whitechapel brothels and horror theaters.