In a futuristic world, humanity faces an unprecedented crisis when a band of radiation from the Van Allen radiation belt ignites, threatening to incinerate the Earth. Against this backdrop, Admiral Harriman Nelson, a brilliant and maverick scientist, devises a bold plan to save the planet. Commanding the most advanced nuclear submarine ever built, the Seaview, Nelson and his crew embark on a perilous mission to extinguish the deadly fire engulfing the sky. The journey takes them from the frozen Arctic to the deepest trenches of the ocean, facing both natural and man-made threats.

Amid the high-stakes venture, the crew of the Seaview faces mutiny, monstrous sea creatures, and attacks from enemy submarines that challenge their resolve and teamwork. As they navigate undersea perils, the group—comprising seasoned officers, a sceptical journalist, and a dedicated scientist—must overcome their differences and personal demons. The leadership of Admiral Nelson becomes crucial as tensions rise, with the survival of humanity hanging in the balance. Their voyage becomes not just a test of scientific ingenuity but also a dramatic struggle for unity and courage in the face of overwhelming odds.