When Eva Wingdale sees something large and white flying above her she is convinced that it is a ghost, although most of the other owls just laugh at her--until something large and heavy and white lands on the school roof.

Rainbow Tinseltail (called Bo) has never actually seen a dragon, but when things start going missing from Sparklegrove School for Unicorns all clues seem to point to a dragon pup called Scorch--but when Scorch does not return to the dragon caves, Bo and her friends become worried that he has gotten lost in the forest and they set out to find their new friend.

Despite disagreements on the wisdom of the adventure, Rainbow Tinseltail and the other unicorns set out for Snowbelle Mountain to find out if Yetis are real--and when they get caught in a blizzard and take shelter in a cave they find the answer to their quest.

When Mrs. Featherbottom places Eva in a different club from Lucy and Hailey, Eva misses her best friends, but she learns new things about her classmates, and discovers that someone in her club is missing a friend too.