Set 18 years after the sinking of the previous Poseidon, the world’s largest and most technologically advanced luxury vessel, POSEIDON II, is launched.
Equipped with:

• AI navigation

• self-stabilizing hull

• tsunami detection systems

• underwater escape pods

The ship is believed to be “unsinkable.”

During a global broadcast voyage, POSEIDON II is struck not by a rogue wave — but by a mysterious deep-sea shockwave coming from below the ocean floor.

The ship capsizes in minutes.

With water rising, power failing, and the hull groaning under crushing pressure, a small group of survivors must climb upward through the overturned luxury liner — while discovering that the shockwave may not be a natural event.

Something ancient may be awakening beneath the ocean.

⚓ Why the Film Works

✔ Incredible tension

Claustrophobic underwater corridors, collapsing floors, fire-flooding chambers — the film keeps viewers on edge from beginning to end.

✔ A fresh mystery element

Instead of a simple disaster, the story connects the shockwave to deep-sea seismic anomalies and lost oceanic mythologies.
It’s still grounded, but with unsettling echoes of The Abyss and Deepwater Horizon.

✔ Strong ensemble cast

The characters feel real, flawed, and desperate.
Standouts include:

• Captain Amelia Rourke, a calm but guilt-ridden commander

• Dr. Elias Ward, an oceanographer with knowledge of deep-sea tectonics

• Talia, a teenage hacker whose skills become crucial

• Marcus Dane, a retired firefighter fighting PTSD

✔ Brutal realism

Every escape scene is dangerous:

• elevators flooding

• ceilings collapsing

• kitchen firestorms igniting the overturned rooms

• hull breaches creating violent suction

Survival feels painfully earned.

🌌 Spectacle & Visuals

The underwater cinematography is gorgeous and terrifying:
glowing abyssal trenches, bioluminescent creatures, and the sideways interior of the ship become a visual feast.

The capsizing sequence is one of the best disaster scenes in recent years.

💥 The Ending (No Spoilers)

The survivors uncover the true cause of the shockwave — leading to a final escape that is both thrilling and emotionally powerful.
The last 30 seconds hint at a much bigger story and a potential Poseidon cinematic universe focused on deep-sea mysteries.