The film is divided into two episodes - "The Acquaintance" (Russian: , based on the 1892 short story "The Adventure of the Speckled Band") and "Bloody Inscription" (Russian: , based on Conan Doyle's 1887 novel A Study in Scarlet).
Head entity: A Study in Scarlet
Tail entity: Sherlock Holmes and Dr. Watson
Relation (head \u2192 tail): based on
Inverse relation (tail \u2192 head): derivative work