Nitrate Flash

Desmond Blythe is a solitary film archivist working the night shift at a temperature-controlled, subterranean nitrate film vault. Surrounded by thousands of decaying, highly unstable cellulose reels, he is the guardian of forgotten history. But cellulose nitrate doesn't just burn-it produces its own oxygen, making it impossible to extinguish once ignited. The nightmare begins when Desmond inspects a newly donated 1920s reel on his editing table.
The black-and-white silent footage shows a masked figure walking down a dark concrete corridor. Desmond's blood runs cold when he recognizes the setting: it's the exact hallway right outside his locked viewing room. The film isn't a hundred years old; it's a physical print being developed in real-time and fed down the ventilation shaft. Someone is broadcasting their live hunt. The intruder isn't armed with guns or knives.
They are exploiting the vault's deadly contents, piling "sweating, " highly degraded nitrate reels against the exit doors to create an unstoppable, self-oxygenating fire trap. Accessing the digital donor manifest, Desmond uncovers the terrifying truth: the vault is a covert dumping ground for illicit snuff films produced by a secret society of wealthy elites. The intruder is a corporate cleaner sent to incinerate the evidence, with Desmond trapped inside as collateral damage.
Knowing water and fire suppression systems are useless against a nitrate blaze, Desmond must weaponize the explosive chemistry to save himself. Gathering heavy steel canisters filled with the most volatile decaying stock, he wedges them against the reinforced electronic blast doors and triggers them with the intense heat of a projector lamp. The resulting massive pressure explosion blows the multi-ton doors off their hinges, allowing him to barely escape into the freezing, snow-covered forest above.
Clutching a single reel of incriminating evidence, Desmond stands alone in the dead of night, watching the bunker burn with an impossible chemical flame-the sole surviving guardian of a deadly, century-old secret.