 On New Year night, Poseidon, the luxurious cruise liner was hit by a majestic rogue wave flipping it upside down. With help several hours away most of the passengers decide to sit it out. However, Dylan Johns (Josh Lucas) decides to get off the already sinking ship, by climbing to the hull (now on top). He is joined by Maggie James (Jacinda Barrett) and her son Conor (Jimmy Bennett), Robert Ramsey (Kurt Russell), his daughter Jennifer (Emmy Rossum) and her boyfriend Christian (Mike Vogel), Elena Gonzalez (Mía Maestro) and Richard Nelson (Richard Dreyfuss). Will they all make it out before the ship sinks?