time their children suspect they are up to mischief on a far greater scale. When Peter and Tilte learn that scientific and religious leaders from around the world are assembling in Copenhagen for a conference, they know their parents are up to something. Peter and Tilte's quest to find them exposes conspiracies, terrorist plots, an angry bishop, a deranged headmaster, two love-struck police officers, a deluded aristocrat and much more along the way.