Lilly and Her Vampire BFF is about an imaginary teen who always dreams of a best friend years after being a nerdy outlast kid when one day she meets a friend during a trip to an old mansion with her school she finds a locked room that was a prison for a 100-year-old Vampire who thinks that Lilly is his long lost lover and finds out that she is a descendent of his former lover he is tasked to protector her from hunters.