Catastrophe! All the dragons of the school have disappeared! The Mage Epispontex tries to calm down the panicked director: they will come back! Indeed, as every 300 years, it is the year of the dragon. All the dragons fly to a secret place to give birth to a new generation of the species. More serious for the school, Song Hui, the official supplier of the magic school of Melusine, has stopped all his deliveries. The potions must be heated to dragon fire to have magical properties, and Song Hui prefers to wait for the return of the new generation of dragons before resuming his deliveries. As the magic school slows down, the flight of a philtor of illusion at Song Hui will propel Melusine into a new mission on the trace of the dragons in the reproductive phase.