The battle lines have been drawn and Mari, an Earth Walker and Nik, a Companion, who were once from rival clans now find themselves fighting to save each other and their people from destruction. Thaddeus betrayed his own people, killing Nik's father and destroying their entire clan. But he wants more. He wants the power he believes Mari has stolen from him and his people and he will do anything he must to get them back, even if it means destroying everything in his path. There is only way to stop Thaddeus, but it means a harrowing journey for Mari and Nik into the heart of darkness. But if they hope to survive the coming fight, they have no choice but to believe in each other.