A series of seemingly disconnected murders have drawn the attention of a police delegate shortly before the largest meeting of the Americas’ leaders: The Mercosur Meeting, which will be attended by world authorities and leaders in economic management. There is someone willing to make this meeting a failure. What would be the consequences if the future US president were murdered on Brazilian lands? Who is the mysterious murderer, the man behind the codename "X-strange"? You discover and accompany the Brazilian and international authorities in this thriller that leaves nothing to be desired for the best texts of the genre.