In the midst of mysterious rumblings and glass bursts that arises extravagant Jolyon Wagg, insurance salesman. His unceremonious annoys and promises other surprises in future episodes. The sounds actually come from laboratory Sunflower, left for a conference in Geneva. The professor also developed a weapon that is the envy.
In this album, Tintin finds Castafiore which meets for the first time the captain. Hergé chooses to expand the consistency of its main female character. Her diva image is broken because it demonstrates some courage in helping our heroes.