Hiroto and Kazami have made a small but very important improvement in their relationship. However, the Build Divers and the Resistance are now overwhelmed by the attack of the mysterious Gunpla known as "Seltsam." The pendant that Muran entrusted to Hiroto and the others seems to become a key to turn the tide, but… Meanwhile, May begins gathering intelligence at Magee's bar.
Response on the active sonar.
رصد السونار النشط استجابة
Das Aktiv-Echolot reagiert.
El sonar activo detectó algo.
El sonar detecta algo.
Signaux sur le sonar.
Segnali sull'active sonar!
Resposta ao sonar ativo.
Есть сигнал на сонаре!