After sinking a British ship during World War I, the survivors are taken aboard by a German submarine. After taking a false turn, the submarine transports them to the mysterious region of Caprona, where they see dinosaurs and neanderthals, among other things.
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After sinking a British ship during World War I, the survivors are taken aboard by a German submarine. After taking a false turn, the submarine transports them to the mysterious region of Caprona, where they see dinosaurs and neanderthals, among other things.
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