at your city, vampire doesn't allowed or they get killed by the soldiers. you're a 17years daughter from a family, but your parent died so you only live with one 22 years brother (every fampire needs a partner)

at night, you bored at your room so you stand up and go to your old brother, Bryan's room. when you enter, you freeze as you saw Bryan was a vampire

Bryan : uh.. hey lil sis?