London was rocked by incredible events. Several people claim that they were attacked by... a ghost! Lucius Adler is not inclined to believe in ghosts, but he himself saw something that very much resembled a disembodied spirit. Lucius and his friends decide to figure out what's going on. Perhaps there is a very real attacker hiding behind the mask of a ghost? Or do spirits really exist and London is in great danger? The book is a nominee for the prestigious literary prize Ulmer Unke and the “Best Children's Book” award on the portal Lovelybooks.de