It's New Year's Eve on the Poseidon. Former Mayor of New York Robert Ramsey is travelling with his daughter Jennifer and her fiancé Christian. Elena is a stowaway on the ship trying to get to New York so she can see her sick brother in the hospital. Valentine is the waiter that is helping her get there. Richard Nelson is a gay man who has recently broken up with his boyfriend. Dylan is a happy go lucky gambler and Maggie is a single mother traveling with her son Connor. Shortly after midnight the crew notice a wave in the distance and try to run but the wave hits the side of the ship, capsizing it.