In the fairytale kingdom of Empyrean, time has moved on. The princesses of once upon a time, like Snow White and Cinderella, have grown old and become great queens. Now, their kingdom is in danger. A Forgotten Evil has returned. In a small village by the sea, two sisters, Zandria and Olena, begin a dangerous journey for Zandria to claim her birthright as a queen. Along their journey, they meet some unique friends and terrifying enemies while trying to survive places like the Dead Forest and escape troll-infested castles. Will they make it to the Crystal Castle in time to save Empyrean or will the sisters lose each other forever? One thing is certain, before their journey ends, Zandria will learn what it means to be The Fourth Queen

Zandria and Olena continue their adventures in the land of Empyrean. Zandria discovers a magical crystal that may be the clue to finding their mother, who has been missing the past six years. Zandria and some new friends set out on a quest to recover the other crystals. The wicked Carnivale Chaotica ringleader, Raymond Shaydaway, wants the crystals for his own evil ends and will stop at nothing to take them from Zandria. Now Zandria must solve the mystery of the Lost Queen if she has any hope of finding her mother.

In this third book of the Empyrical Tales, it is a year after the events of The Lost Queen. Zandria and her younger sister, Olena, seem to be growing apart. But now, Olena has mysteriously disappeared without explanation. To make things worse for Olena, she is having trouble with her magical abilities. With the help of an unusual bronze ring, Olena leaves the crystal Castle Empyrean in disguise. She soon steps into a land of giant crocodiles, unending deserts, ancient pyramids and even mummies! Now Olena must discover the truth about the dinosaur-like race that lives beyond the southern border before they attack Empyrean. All the while, she struggles with faith in her own abilities. Will Olena regain her magic in time? To find out, she has to become The Secret Queen.