The only way the few remaining humans can survive the Vampire Apocalypse is by continually staying under the sunlight – but fuel, resources and transportation are running low.
I can see an updated OMEGA MAN (or I AM LEGEND) but the logline needs to give me what is unique about this particular movie.
Also, specify who is the main character. A “few remaining humans” is too generic for an audience to have any anticipation of empathy.
Finally, it reads like an open-ended premise. They will have to continually stay under the sunlight.
Can you give us a deadline? How would an audience visualise a positive outcome? Then, this could be the goal for the main character(s).
Good idea for a story, but I agree with Karel that specifying the protagonist would increase impact.
I’d re-word the logline to make it less clunky. Maybe something like: “[Human survivors/protagonist] of the Vampire Apocalypse need[s] to stay out in the sunlight– but fuel and resources are running low as darkness sets in.”
Just a suggestion.