Original: Written by Buffy creator Joss Whedon, the series follows a Slayer named Melaka Fray, a chosen one in a time where vampires (called "lurks") are commonplace in the slums of New York City, and the rich-poor divide is even greater.
Simplified: The series is written by Buffy creator Joss Whedon. She is the chosen one in a time where vampires (called "lurks") are common, and the difference between rich and poor people is even greater.