Shoot a feature film in one take... in 12 minutes...
That is some simple math, but what would the story be?
You couldn't record sound, so any monologue/dialogue would have to be recorded and dubbed in later... and you couldn't lip sync at that speed, so I would focus on telepathy or only internal thoughts. Something like... people's thoughts in the last moments before a disaster strikes. With green screen, you could add a main character in later who moves in real time. A scifi premise where the main character is out if sync.