Author(s): Victoria Schwab
Something ancient and evil has awoken from beneath the world of Erdas. Four young heroes, Conor, Abeke, Meilin and Rollan, are determined to stop it. Together with their spirit animals, they embark on a desperate journey that takes them deep underground and to the far corners of the world. As friends and allies fall around them, the four have no choice but to push forward and confront this darkness.