An evil maniac is operating in the city, several people have already fallen victim to it and it's a matter of honor for a detective to catch him in Letters from the killer. At the scene of the last crime was found a letter from the killer. Surely this is the code and it points to several objects named by it. They need to be found, perhaps this is the thread that will lead to the villain. He wants to play with law enforcement officers, and you have to outwit and beat him in order to catch and not let him commit another crime.