At the opening party of a colossal—but poorly constructed—skyscraper, a massive fire breaks out, threatening to destroy the tower and everyone in it.
After "The Poseidon Adventure", in which the ship got flipped over by a tidal wave, the ship drifts bottom-up in the sea. While the passengers are still on board waiting to be rescued, two rivaling salvage parties enter the ship on search for money, gold and a small amount of plutonium.
A delirious young woman feels trapped in a remote mansion at the mercy of a madman.
