What is the show Pretty Little Liars about?

"Pretty Little Liars" is a mystery teen drama television series that follows the lives of four high school girls in Rosewood, Pennsylvania, as they are tormented by an anonymous figure known only as "A." The show begins with the disappearance of Alison DiLaurentis, the leader of the group, and follows the remaining four girls - Spencer Hastings, Aria Montgomery, Hanna Marin, and Emily Fields - as they try to uncover the truth about Alison's disappearance and the secrets that each of them is hiding.

As the series progresses, the girls receive mysterious messages and threats from "A," who seems to know their every move and secret. They begin to suspect everyone around them, including their friends, family members, and even each other. The girls must work together to uncover the identity of "A" and stop their torment, all while dealing with their own personal issues and secrets.

"Pretty Little Liars" explores themes of friendship, betrayal, secrets, and identity, as the girls navigate their way through the drama and mysteries that surround them. The series also features various romantic relationships, family dynamics, and twists and turns that keep the audience guessing until the very end.