Книга Lena-prosecutor. Russian story

The hero suddenly receives a message from the past and goes to an unheard of adventure, to revive the deceased. What is it, somebody’s joke, a rally or really invented the Elixir of Eternal Life? But real life puts everything in its place. The adventure turns into a deadly danger, and love is an official necessity. The story is quickly read, it is really interesting. There are here also characteristic characters, there is a twisted plot and an unexpected ending.