The luxurious ocean liner Poseidon takes a month-long cruise for Christmas and is already returning home. By an absurd accident, the captain makes an unforgivable mistake, and the ship turns upside down and begins to slowly sink. Disaster zone - Azores. Most passengers and crew members die. Only 14 passengers manage to survive. They find themselves locked in the restaurant. The whole world turned upside down for them. On the way to salvation, a lot of obstacles await them in the form of overturned stairs, locked doors and other things. But this is not the worst thing. A split is emerging within the team, which only by uniting can win the battle against the elements. People begin to behave inappropriately: insults, threats, loud revelations and... ridiculous deaths. And against the backdrop of this dramatic situation, there is an amazing story of true love, which, perhaps, is destined to last only a few hours... The liner slowly continues to sink under water...