Driven by Zorglub and Champignac, Spirou will try to go back to the past, in order to save the friends of the two scientists, Miss Flanner. From Africa to Palombie, Spirou will relive the thread of his adventures to finally arrive at the time when Zorglub, Champignac and Miss Flanner were then three scientific students who were sacredly gifted but terribly dangerous. He will have to prevent the worst from happening in the past in order to save, today, the one who has continued to divide the two men, each demanding the favors of the beautiful and young scientist. And if the past was not the one we know? If Spirou did not really have the life we know him? The papillon effect has such strong underlying repercussions that Spirou finds himself caught up with himself and his story. The truth is not always the one we believe.