Back on the world where Narvarth and Callista were hidden, Granite finds an empty house. Her friends have disappeared, and with them the keys that allow access to the parallel universe. Assisted by the secret agent Danaëlle with whom she forms a team, Granite starts on the track of what looks very like a kidnapping. A twelfth album full of surprises that mixes galactic politics and great adventure thanks to an investigation conducted at the pace of charge by the duo of charm and shock that form Granite and Danaëlle, and that will see the rise in power of what could become the greatest threat that the Federation of Worlds has ever known.