When teenagers Zac and Emily stumble upon a hidden cave at the dead end of a forgotten service road, they find themselves transported to a breathtaking yet perilous world unlike anything they could have imagined. Still on Earth, but untouched by modern technology, this secret realm is populated by towering giants, ruled from a stone fortress by a sorrowful and powerful Evil Lord, and patrolled by colossal, intelligent birds of prey.

Their escape from shadowy pursuers in their own world has led them to an even greater danger. But in this land of immense scale and ancient secrets, they find an unlikely ally in Aurum, a magnificent golden dragon. Chosen by the majestic creature, Zac and Emily must learn to become dragon riders, navigating a landscape filled with both wonder and threat.

As they journey through valleys dominated by giants and beneath skies patrolled by winged behemoths, Zac and Emily must unravel the mysteries of the Stone Lord's sorrowful reign and find a way to bring hope back to this oppressed world. Their quest will lead them to a confrontation with the Evil Lord himself, a battle where their courage, their wits, and their bond with Aurum will be their only weapons.