Agarta regains consciousness in a ghost town with no one else in it. The streets are empty, the signs are unreadable to her, and her memories are gone. Only the strange markings that appear on her hands remain, naming her the devourer of dragons, though what that means escapes her. She doesn't know who she is, why she's here, or what she's supposed to do. As she searches the lifeless town for answers, a grotesque creature pursues her relentlessly. When she is close to giving up, a strangely familiar voice urges her to stop fleeing, and she must find the courage to face the monster that may hold the key to her past. The result is a single-episode OVA blending action, fantasy and science fiction.