On his sixteenth birthday, the therian Rex Himmel learns that he is special--but no one will tell him why. Ordered by theria's leader to join the militaristic therian Cover Force, Rex soon finds himself involved in an investigation of several mysterious, frozen Cthonian bodies that have been discovered in theria. Just as his team finds a reason for the bodies' appearance, theria's power plant is destroyed in a violent attack from below. "The...