At the same time the wise Sedelpäh returns from his polar expedition with a curious artifact. An artifact completes himself with a part that was kept in the cellars of the conservatory. At the same time the wise Sedelpäh returns from his polar expedition with a curious artifact. An artifact that completes himself with a part that was kept in the cellars of the conservatory. At the moment when the two parties are assembled, a flash occurs and then nothing more. Nicolede decides to yield to his venerable occupations and must preside over the race that Lanfeust wins. But when he gives him his trophy, the drama occurs and Lanfeust assassinates Nicolede. Qynost, curiously wants to silence Lanfeust and all the witnesses of the drama like Sedelpäh's assistant, Ryplëh who can make the past happen again. For his part, Hebus does not believe in the guilt of his friend, he makes him escape to discover the truth, and both start to pursue Ryplëh.