An encounter with a category three Lucifer Hawk leaves Katsumi badly injured, but the hospital is the safest place for her to be, considering that the creature is still on her trail. A strange voice in her head, however, prompts Katsumi to leave behind the AMP protective barrier that surrounds the building, an action that places her in grave danger. Surprisingly, the voice does not belong to the Lucifer Hawk, but rather to Grosspoliner, the mystical sword that once belonged to her father. Freeing Grosspoliner from the tower that has served as its prison since the turn of the century, Katsumi finds both a new companion and a powerful ally in the battle against the Lucifer Hawks. Katsumi is eventually healthy enough to return to active duty, but it's her life outside of work that's now in shambles, as she learns that her apartment has been destroyed. Unfortunately, payday isn't anytime soon, so a hotel is out of the question. Instead, it looks as if she and Grosspoliner will be spe