The story follows the strange and harrowing adventures of Arthur Gordon Pym, a young man who secretly boards a whaling ship departing from Nantucket. What begins as a reckless adventure quickly descends into chaos when mutiny, shipwreck, starvation, and violence overtake the voyage. Pym and the surviving crew endure brutal conditions at sea, facing madness and death as they struggle to survive in the vast and unforgiving ocean.

As the story progresses, the novel shifts into a mysterious exploration of the Antarctic, where Pym encounters strange lands, cryptic symbols, and unsettling inhabitants. The journey grows increasingly surreal and ominous, blending realistic maritime detail with Gothic horror.