On New Year's Eve, a luxury ocean liner sails slowly across the "calm" waters of the North Atlantic with its merry band of tourists. A lavish New Year's Eve reception is taking place in the ship's huge and luxurious auditorium. The rich and famous were mingling and enjoying the glittering atmosphere, and some of them were even intoxicated on the colorful dance floor. When the people on the huge ship in the vast ocean above the song and laughter, the unfathomable bottom of the ocean but a violent crustal movement, which triggered an unprecedented tsunami called the "sea dog", the previous slightly calm sea surface steeply set off a raging giant waves. The towering wave roared like a wild animal on the sea and quickly pounced on the unprepared "Poseidon" from the side. In an instant, the Poseidon was crushed by the 90-foot wave and capsized on the surface. Countless passengers lost their lives in the unpredictable ordeal, and those who were lucky enough not to be killed by the wave were in a state of panic and disarray. The "calm" captain ordered the surviving passengers to stay put and wait for help.　

The ship's casino, where professional gambler John Dylan (Joshua Kennedy) is enjoying a game of chance, is a place where he can play. Dylan (Josh Lucas), a professional gambler who is enjoying himself at the ship's casino, is forced to leave the ship. John Dylan (Josh Lucas), a professional gambler who is enjoying himself at the ship's casino, is unwilling to sit back and wait for help after a sudden disaster strikes. To a single mom, Maggie (Jacinda Bartlett) and her smart-alecky son. (Jacinda Barrett) and her brilliant son Kona (Jimmy Bennett). Bennett) have said, just go through the propeller at the bottom of the hull. And you can get out. In the halls there's only waiting to die, Robert? Lemhi (Kurt? Russell) agrees with him, and along the way helps him find his daughter Jennifer (Amy?) and her boyfriend Chris. Rosen) and her boyfriend, Christian (Mike Woog). Christian (Mike Vogel), her boyfriend. In order to escape the danger, the group works together to find a way out of the labyrinthine ship's hold. On the way, they find Jennifer and her boyfriend Christian, as well as two people in need of help. However, the sea is still raging and the water is pouring into the cabin, so in order to survive, the people have to race against time in front of death.