What sank in the dark, didn't die in the dark.
In the shadowy depths of the Atlantic, a forgotten Soviet submarine harbours a deadly secret: the last atomic warhead bound for Cuba during the Cold War's feverish brink.
When a destitute Russian author unearths his father's diary, chronicling the doomed voyage as captain, he unwittingly ignites a chain of cosmic terror.
Enter ambitious CIA agent Hauser, eager to claw his way up the agency's ranks by salvaging the relics hidden payload. He assembles a ragtag crew of saturation divers, desperate souls willing to brave the abyss for the biggest paycheck of their lives.
But as they descend, the oceans depths awaken with unholy fury. Hallucinations plague them: grotesque mutated figures writhing in the murk, razor toothed aquatic abominations lunging from the void, and a spectral juggernaut, a phantom wreck diver, relentlessly stalking them with violent intent.
Just as madness grips the team, Unit 14, the CIA's clandestine basement division specializing in the paranormal, inexplicably appears.
The truth unravels: the sub's mission was a smokescreen for recovering a crashed UFO, an otherworldly entity that bio-engineers marine life into mind-warping predators.
In this third instalment of the Unit 14 series, the line between earthly peril and interstellar dread blurs, forcing the crew and agents alike to confront the insignificance of humanities wars amid the universe's indifferent malice.
Will ambition and deceit spell doom or can Unit 14 contain this cosmic threat?
