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Director Brad Peyton leans heavily into the "Verne-ian" concept that on the Mysterious Island, everything small is big and everything big is small. This creates some of the film's most memorable visual sequences:

The narrative centers on a coded distress signal Sean receives, which he believes was sent by his long-lost grandfather, Alexander (played by Michael Caine). This premise sets the stage for a rescue mission that takes them to a mythical land where the rules of nature are reversed—small animals are giant, and giant animals are tiny.

With a final, desperate dive into the rising tides, they reached the controls of the ancient sub. As the island slipped beneath the waves forever, the Nautilus surged forward, carrying them back to the surface—and leaving the secrets of the earth behind once again.