In their third breathtaking adventure, Emily and Pegasus must confront their most dangerous challenge yet. When news reaches Olympus that a Pegasus lookalike has been spotted in the human world Emily and her friends are determined to fly back to Earth to investigate. Their new mission takes them from Area 51 to Las Vegas where they discover a sinister conspiracy. Emily is convinced that they will trace it back to their old enemies - the corrupt governmental agency, the CRU. But what they find is bigger and more dangerous than they ever expected and will pit Olympian against Human in a war of epic proportions. With the fate of two worlds in her hands, Emily must make an impossible choice, otherwise everything she has ever known and loved will be destroyed. Join Emily astride the magnificent winged-stallion, Pegasus, as she embarks on a new flight of adventure through worlds both old and new.