Geronimo Stilton is summoned back to the Kingdom of Fantasy, but he finds Blossom, Queen of the Fairies, surrounded by dark fairies and behaving very coldly--and it is up to Geronimo to figure out just what is going on and find the allies he needs to free Blossom from the evil spell that is affecting her.

Geronimo joins the effort to rescue Blossom, Queen of the Fairies,

On his way to the Grand Masked Ball and what promises to be a disaster of a date, Geronimo's once again whisked away to the Kingdom of Fantasy where he must save the Princess of the Vanilla Fairies from an evil wizard who's using the pirate ship, Ship of Secrets, to gather magical objects to increase his power and take over the kingdom.

Blossom, Queen of the Fairies, has disappeared, along with three powerful magical objects, the Book of a Thousand Spells, the Crystal Sphere, and the Whispering Wand, and Geronimo Stilton is once again called on to confront an evil wizard, rescue the Queen, recover the objects, and save the entire Kingdom of Fantasy.

The enchanted Winged Ring which Queen Blossom gave to Geronimo is missing, apparently stolen by the dark fairy Wither and her dark crow allies, and whoever possesses it gains enormous power and can travel between the Kingdom of Fantasy and the real world. Now nightmares are starting to affect Mouse Island, the entire Kingdom is furious with Geronimo, and it's up to one mouse to set things straight and recover the ring.