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.
An active volcano threatens a south Pacific island resort and its guests as a power struggle ensues between the property's developer and a drilling foreman.
A young woman has spent her life tormented by the death of her mother, who was on a ship torpedoed during World War II. When her father hires an investigator to look into the circumstances of the mother's death 30 years prior, it triggers a new rash of emotional turmoil for the young woman and uncovers a heinous crime.
