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The author of the most popular romance novels, Alexander Kostrov, writing under a female pseudonym, after an accidental electric shock receives a mystical ability to see future crimes, namely, the details of a murder that has not yet been committed, but has already been predetermined.

Alexander, having learned from the news about the death of a young teacher in a city park, understands that he observed the details of this particular crime in his vision. The writer comes to the Investigative Committee and, introducing himself as a "witness", gives testimony to the Investigative Committee employee Victoria Lunina.