Deep within the Earth's crust, a world hidden from humanity emerges as a young explorer and her team discover the secrets of The Mantle's Mantle, only to find themselves trapped in a race against time and the forces that want to keep the inner world hidde...

Deep within the Earth's crust lies a hidden civilization, protected by a mysterious force known as The Mantle. When a team of explorers accidentally triggers a catastrophic event, they must navigate the treacherous realms to prevent an apocalyptic disaste...