Meteorological phenomena of an alarming magnitude are raging throughout Western Europe, upsetting the lives of millions of men... To a long and deadly winter succeeded a thaw conducive to floods. These calamities did not spare France, and it is in a Paris that the dreads of time do not leave to worry the population that Professor Mortimer disembarks. Concerned by these weather fluctuations and its disastrous consequences, his government commissioned him to determine its causes, and it is with this objective in mind that he goes to Jouy, to his old friend Professor Labrousse, director of the weather. But Mortimer is diverted from these exciting scientific concerns by an unfortunate affair: the unexplained disappearance of the taxi driver whom Labrousse had sent to search Mortimer at the station. In fact, Mortimer is the last to have seen him alive and becomes the main suspect of the police. Our bouillant Écosais decides to solve this new enigma, and counts on the help of Captain Blake, he also disappears from the path of the dark one, and disappears from the network of the dark one. He goes to the network of the MI5.