Im Forschungsinstitut breitet sich nach Yukinas Verschwinden Panik aus. Dr. Hausen macht eine überraschende Entdeckung. Sophie erhält indes eine rätselhafte Botschaft.
The Cactus unit returns to the space station with Yukina whom the Efy Dolgh believe is Muetta. At the UN, Dr. Hausen reveals that Yukina and Muetta share the same DNA and concludes that Yukina was taken by mistake. The UN discuss a rescue mission, but no decision is made. While sitting alone Sophie sees some writing appear, asking if she wants to learn the truth about demons. She agrees, and when she returns home the Demon is waiting. He introduces himself as Zeringer Mundef Bischrei. He reveals little, only that he is an enemy of the Efy Dolgh. Kennosuke asks Muetta (Yukihime) if she will pilot the Kuromukuro (Black Grongul) with him. She agrees to assist him to take the Kuromukuro to the space station, but cannot guarantee his return. As they prepare to leave in the Kuromukuro, they see a recorded message from Princess Yukihime imploring her ancestors to fight the demons and protect the Washiba Clan. Muetta wonders if there are things about her past that she does not know. On the space station, Yukina escapes from captivity and realises that she's no longer on Earth.
L'istituto di ricerca è in allarme per la scomparsa di Yukina. Il dottor Hausen fa una scoperta sorprendente. Nel frattempo Sophie riceve un misterioso messaggio.
黒部研究所へと連れて行かれたムエッタは、研究によりDNA型が由希奈と完全に一致することが判明。一同は由希奈がムエッタと間違えられて連れ去られたことを確信する。洋海は由希奈を奪還するため奔走するのだが……。
유키나가 사라졌다는 소식에 연구소는 공황 상태에 빠진다. 하우젠 박사는 놀라운 사실을 발견하고, 소피는 수상한 메시지를 받는다.
Instytut badawczy ogarnia panika w związku ze zniknięciem Yukiny. Dr Hausen dokonuje zaskakującego odkrycia. W międzyczasie Sophie otrzymuje tajemniczą wiadomość.
