Book two of the Cobalt Series finds Casey Campbell back in the Yellow Daru, but this time she doesn't have her satchel or Beckett Lancaster. Faced with the likelihood that a friend might die from the injuries he suffered due to an attack, Casey navigates her way through the trails in search for a White. What she inadvertently discovers is the cobalt mine, the mother lode Pioneer seeks. When there is no word about where Casey is, Beckett sets off to find her. The bowman proves his archery skills in the Red Mecca and unbeknownst to him draws the attention of Garnet, the Red Legion member. Beckett is surprised when Garnet challenges him to a public bout. Something that Jake, Beckett's father, would not condone. Something the people of the Domain will not soon forget. Pioneer continues to rule the Domain with his sinister methods and heartless behavior. He sentences Julia to her certain death by imprisoning her. Julia has other ideas. Continue on the cobalt journey as Casey enters her own strategic cat and mouse game with Pioneer during her quest to determine whether or not she should reveal the location of the cobalt mine and the place the lives of every Domainian at risk or keep it a secret and potentially lose any hope for saving her friend Tanya. The secrets run deep and the questions continue to arise in The Cobalt Mine.