Ten-year-old Deedee loathes her brother Matthias. He relentlessly challenges her, nags her and bothers her. One day he crosses the line and Deedee's swears she will get back at him. Together with her old neighbor Ton and his dog Teddie she sets out to free the world of Matthias' harassments. Will she succeed in getting her brother to tone down? And who are Vrassos, Aikja and Kreis? Are they on her side or will they turn against her, as well?
Illustrated by Philip Hopman