The TV series "Two Sentence Horror Stories" uses the high-concept of one sentence for the story set-up and one more for the resolution. This horror porn vignette is more like One Sentence Horror Story.
The good news is that considerable suspense and dread is conjured up by pornographers Bree Mills and Craven Moorehead, though the payoff is weak.
"Countdown" takes place entirely in a jail cell, with jail-bait actress Eliza Jane trapped there with Ryan Driller, as a digital countdown clock heads downward from the 24 hour mark. They talk about their predicament and discover that human contact (touching) brings about a blackout and ear-piercing siren, but the gift by their unknown captors of supplies.
Ultimately, egged on unconvincingly (believability is never a strong point for these Bree Mills productions) by Eliza, they have sex in order to please their captors and perhaps be set free, leading to a rather anticlimactic ending.
The show's editor Woody All-In tries his hand at screenwriting, and fails to develop this material beyond its basic one-liner premise.