After leaving the captured Fantômas in the custody of Jerome Fandor, Inspector Juve is shocked to learn that the journalist has let him escape. With Fandor under suspicion of being an accomplice of the Genius of Evil, the two friends follow separate paths to track down their nemesis, with the final chapters of this, the thirty-sixth of the Fantômas novels, comprising what is surely the most dizzying, breakneck action sequence of the series.