On his way to an International Conference of Sleuths in his balloon, Alphonse le Flic, eminent detective, is forced to land in the courtyard of Lion Castle. By chance, his old friends the Frog Band are there, and together they help Brooker Lion to solve the age-old mystery of Lion Castle.
On his way to an International Conference of Sleuths in his balloon, Alphonse le Flic, eminent detective, is forced to land in the courtyard of Lion C...