"Sole Survivor" is a horror movie which opens with a palpable sense of dread and some effective moments but squanders them all in a final act which reveals it has no idea what to do with the points it's earnt.
The plot is about a plain looking woman who is the titular "sole survivor" of an airplane crash. She appears to suffer hallucinations of those who died in the crash following her around.
But are they hallucinations or are they... REAL?! You probably won't care. I know I didn't.
The spectres of the deceased, who look like extras wandered over from whatever zombie movie George Romero was shooting that year, are at first spooky but soon become boring since they mostly just stand there. The movie doesn't really develop the idea it starts with, until a rushed conclusion at the end which is entirely unsatisfying.