In this postapocalyptic fantasy, a sea of sand swallows everything but the past. Chakuro and the other Marked children have freed the Unmarked from the Amonlogian dungeon, but their rescue mission is far from over. The people of the Mud Whale still need to get back to their island home, and the path to safety is blocked by imperial soldiers. Even worse, Orca is determined to secure Ouni in order to carry out his diabolical plans! Chakuro and the other Marked children have freed the Unmarked from the Amonlogian dungeon, but their rescue mission is far from over. The people of the Mud Whale still need to get back to their island home, and the path to safety is blocked by imperial soldiers. Even worse, Orca is determined to secure Ouni in order to carry out his diabolical plan