A news conference is held by Professor Barrel Caskett and his old friend Werner Von Bluecher about the upcoming journey to the Forbidden Island in a large airship called the Sulphur Bottom to search for the Mother Lode. Barrel recognizes a reporter, Yuna, as his lost daughter, Matilda Caskett, who warns them of the catastrophe that could transpire if they pursue their journey. Yuna escapes with her servant, a Reaverbot flying machine-like being named Gatz to break the windows for her escape. Ignoring her warning Bluecher continues to the center of the island. Yuna orders Gatz to give warning shots but due to the hostile retaliation of the Sulphur Bottom, Gatz damages the engine, forcing the airship to descend to the island below.