While living in the old inn of Nemesté, James discovers that he and his parents are not the only ones calling the inn home. On the third floor lives a mysterious old lady named Rionzi DuCrét. Though the villagers fear Rionzi and have confined her to her room, she and James strike up an unlikely friendship. They soon discover that they have both befriended leafy, mushroom-footed creatures in the woods called 'Fidoris.' But the friendship is threatened as Rionzi grows suspicious of James's claim of a certain Fidori sighting. How could he have found out about her deepest secret? Have the villagers set a trap for her to finally prove that she is insane?