A group of strangers find themselves trapped in a maze-like prison. It soon becomes clear that each of them possesses the peculiar skills necessary to escape, if they don't wind up dead first.
(Think of how distinctive and involving the people, caught in a somewhat similar predicament, were in Robert Wise's "The Andromeda Strain" without being "movie stars.")
A storyboard artist with "Johnny Mnemonic" among his credits, Natali has made several short films, including "Elevated" (1996), in which three people, trapped in an elevator, are menaced by an unseen force.