It and Fiddler, agents of the Official Service, receive a wonderful assignment that they have been asking for for a long time. They will have to work again on Terra Zero, where there is now a confrontation between the White Alliance and the Official Service. Aviation, science, work “in the field” - what could be better? But something is wrong. Research is being disrupted, the Meta-Portal project is closed, funding is being cut. Sabotage? Is anyone intrigued? For what? What could happen to Terra Zero if you don't intervene? And what is at stake - your life, the life of your friends, the existence of the planet or... all at once?