Battleship 2 (2025) reignites the global naval conflict against an evolved alien menace. After Earth’s navy barely repelled the first alien invasion, a fragile peace has settled. But when new unidentified spacecraft appear in deep oceans around the world, humanity realizes the threat was only dormant—and now it has returned with terrifying new capabilities.

The film opens with a series of mysterious incidents in international waters: entire fleets vanishing, massive underwater geysers, and communications blackouts. A naval admiral—similar in role to Admiral Shane from the first film—convenes a multinational coalition. This time, instead of just destroyers and cruisers, the fleet includes next-generation stealth submarines and unmanned naval drones, ready for a high-tech fish-out-of-water conflict.

As the allied forces mobilize, the aliens make their move: gigantic submersible warships emerge, firing energy-projectiles that melt steel and disrupt electronic systems. Humanity’s new naval toys prove vulnerable. In a harrowing first clash, a stealth submarine is ambushed beneath the Arctic ice, leaving only one survivor to warn of the alien craft’s adaptive camouflage and self-repairing hull material.

Facing overwhelming odds, Earth’s naval commanders must improvise. A small task force is dispatched on a daring mission: infiltrate a captured alien mother-ship and upload a virus to disable its regeneration systems. This sets up a tense mid-film sequence of underwater infiltration, cutthroat alien guards, narrow escape corridors flooded with seawater, and a do-or-die cyber-warfare showdown at the ship’s core.

Meanwhile, personal stories bring human stakes to the spectacle. A young naval engineer, whose family died in the first invasion, struggles with PTSD but must pilot a prototype unmanned drone submarine in the final battle. An alien captive who survived the first war offers cryptic help—but can humans trust an extraterrestrial with motives unclear? Tensions and betrayals simmer until the climactic moment.

In the finale, Earth’s fleet converges on an alien stronghold deep beneath the Pacific trench. Using combined air-sea-submarine tactics, the human forces launch a synchronized assault: drones pin the alien warships, the engineer’s unmanned submarine sneaks inside, and surface vessels use electromagnetic pulse artillery to disable the alien shields. The alien mother-ship is destroyed, and a global celebration begins as the skies clear and satellites regain contact.

Battleship 2 ends with a sobering epilogue: debris from the destroyed alien ships drifts into orbit, hinting that the war might be won for now—but the greater alien civilization may soon arrive to reclaim its lost technology. Humanity isn’t safe yet, but now we’re better prepared.