"Phantom" (2013) was inspired by the real-life 1968 disappearance of the Soviet submarine K-129, a Golf II-class ballistic missile submarine that sank in the Pacific Ocean under mysterious circumstances.
The sub went missing while carrying nuclear missiles, and its loss remains one of the most secretive accidents of the Cold War.
The U.S. CIA later attempted to recover the wreckage in a secret operation called Project Azorian (or Project Jennifer) in 1974.
There were theories that K-129 may have suffered an accidental missile detonation, a mechanical failure, or even a mutiny - though none were officially confirmed.
The Movie Version
In Phantom, the story dramatizes this event with fictional characters and a made-up plot about rogue officers trying to start a nuclear war using a โphantomโ cloaking device.
The idea of the โphantomโ stealth system is fictional.
The mutiny plotline and the exact events on board are invented for dramatic effect.
Summary
So โ Phantom (2013) is inspired by true events, specifically the mystery of K-129, but the storyline and characters are fictionalized.