Heine and Badou make their way into the innermost depths of Prof. Angelika Einstürzen's underground sanctum. There, in the labs where Heine was born and then violently separated from his siblings, they learn more not only about Heine's past but also about Badou's connection to the professor. Meanwhile, Naoto is confronted by an Einstürzen clone and Frühling, and in the ensuing fight the truth about her origins is revealed.