The idea to make it as a screenplay was partially influenced by the idea I had for a horror anthology thing where I do 3-4 sections based around certain genres of horror, from slashers to ghost stories and found footage, trying to make some ridiculous idea into reality. For example, one idea was a taxi driver who kills people for messing up his cab. Another was partially influenced by the film Carnival of Souls, maybe too much so. I just thought that the idea I had for the female vampire revenge movie would be fun enough to make ridiculous while trying to give it somewhat a serious edge and I did start to come up with some sort of synopsis about the world the character inhabits, which was kind of meant to be a sort of new twist to the post apocalyptic setting. Since the cause of the apocalypse was a virus, humanity cornered a lot of the infected into the larger cities which they nuked to eradicate the virus from spreading further. Afterwards, most of that land surrounding the nuked areas became wastelands due to radiation spreading through the soil farther than expected. Due to this, quarantines were established to contain the radiation to keep it from spreading even more, with things such as glass dome covering the top area and metal walls in the ground. Some cities have survived though and those for quite a while struggle to adapt to the new surroundings. Some die off after 20 years or so but others survive longer while being cordoned off from the rest of the world which does lead to cities having their own social hierarchies, the city in this one being lead by a group of people who have revived fundamentalist Christian values onto its citizens while the leaders are partially the puppets for some of the bandits that live on the outskirts of the cities for their own purposes. This is often achieved using food and water as trading resources. This is what causes the city to target the main character Dawn early on in the story.
But who is Dawn? I have somewhat of a backstory written, partially to get some of how vampires work in this universe, such as how the transformation period takes some time depending on the individuals, blood consumption, their ability to survive out in sunlight being minimal yet possible, while also being slightly more stronger than normal humans. Their organs work still since they are just mostly dead, with their body having regenerative abilities but they take time to heal. Back to Dawn, she wasn't called Dawn as a human but the name was a handle she took up after the apocalypse just to establish a new identity. Her transformation took place about 30 or so years before the virus began to spread, her master abandoning her only a few months after the transformation was done. This lead Dawn to learn how to behave as a vampire on her own which lead to mixed results. She did manage to survive alone for many years due to having a makeshift blood supply stolen from a blood bank. Due to the metabolism of vampires, she is able to survive for a long time on that supply alone, which she has kept preserved with a few generators she scavenged for early on during the end of the outbreak. After the supply is exhausted, she scavenges the cities nearby for survivors for blood, learning how to control her thirst by controlling the amount of blood. Fangs do exist with vampires in this universe yet they are not large. Often they are small enough to not be noticeable unless under close inspection. The enamel has a coating of anesthetic to make the bites unable to be felt after the initial insertion. She wanders the earth for a while but goes back to the cave where she hid for years, living off the blood of bandits who roam the wasteland area living out their own lifestyles.