Escape Plan 4 (2025) begins with Ray Breslin attempting to retire from the high-risk world of prison extraction, hoping to leave behind the dangers that have defined his life. However, his plans collapse when a covert international task force approaches him with disturbing news: a former associate who disappeared years earlier has resurfaced as the mastermind behind a new off-the-grid detention facility known only as “The Citadel.” Unlike any prison Ray has encountered, The Citadel operates underwater in an abandoned offshore drilling complex, using advanced pressure-based containment systems that make escape nearly impossible.

Breslin initially refuses to return to the field, but everything changes when Abigail Ross is kidnapped by mercenaries linked to the facility. Realizing he has no choice, Ray assembles a small but highly specialized team, including Trent DeRosa and the tech-savvy Hush. Their mission is simple in theory but deadly in execution: infiltrate The Citadel, identify the rogue architect behind it, and break Abigail out before she becomes leverage for a global weapons deal.

The team’s journey begins with an undercover operation through black-market smuggling routes in Southeast Asia. Along the way, they learn that The Citadel is not just a prison—it’s a testing ground for psychological warfare and experimental interrogation devices. Prisoners are placed in rotating pressure chambers designed to weaken their senses, making resistance futile. The more Ray studies the structure, the more he realizes it was built using blueprints derived from his own earlier designs, twisted into something monstrous.

Once inside, Ray confronts a gauntlet unlike anything he has faced before. The corridors shift as if the prison itself is alive, controlled by a central AI that adapts to intruders’ movements. DeRosa faces brutal hand-to-hand combat with enhanced guards, while Hush races to disable the system before it seals them in permanently. Tension rises when Ray discovers that the architect behind The Citadel is a former protégé who believes Breslin’s principles of escape are obsolete and must be replaced with absolute control.

Abigail, meanwhile, is held deep within a submerged vault where rising water levels act as a countdown to her execution. Ray’s emotional struggle intensifies as he pushes himself to outsmart traps designed specifically to neutralize him. Each challenge becomes a twisted reflection of his own career, forcing him to question the legacy he has left behind.

The final act erupts in chaos when the prison begins to implode from internal sabotage. Ray and his team navigate collapsing corridors, flooding chambers, and failing pressure seals in a desperate attempt to reach the surface. Their escape becomes a race not only against the prison’s destruction but also against the mastermind’s last-ditch effort to erase all evidence.

Escape Plan 4 ends with Ray rescuing Abigail and dismantling The Citadel, though the film leaves a haunting implication that the blueprint technology has already spread, hinting that the age of impossible prisons is far from over.