In order to fulfill his vow to kill Dr. Einstürzen, Heine resumes his search for the entrance to the Below and the experimental facility where he was born. As he and Badou move further into the depths of the Underground, they're tracked down by Giovanni, who offers to help - but what are his real intentions? Meanwhile Naoto confronts Magato, seeking the key to her past, while Director Neubauten sends the Special Defense Force to attack Einstürzen's fiercest troops.