Pretty Little Liars is an American teen drama mystery series created for television by I. Marlene King and based on the Pretty Little Liars series of novels by Sara Shepard which follows the lives of four girls — Spencer, Hanna, Aria, and Emily — whose clique falls apart after the disappearance of their queen bee, Alison.
One year later, they begin receiving messages from someone using the name "A" who threatens to expose their secrets — including long-hidden ones they thought only Alison knew.
Rosewood is a perfect little town. So quiet and pristine, you'd never guess it holds so many secrets. Some of the ugliest ones belong to the prettiest girls in town - Aria, Spencer, Hanna and Emily, four estranged friends whose darkest secrets are about to unravel.
One year ago, Alison, the Queen Bee of their group, disappeared and the girls swore they'd never tell what really happened that night. They thought their secrets would bond them together, but just the opposite is true.
Then again, who's to say what the truth is in Rosewood. It seems everyone in town is lying about something.
Now, as the mystery surrounding Alison's disappearance resurfaces, the girls begin getting messages from "A," saying – and threatening – things only Alison would know.
But it couldn't be Alison. Could it? Whoever it is, they seem to know all the girls' secrets, and seem to be watching their every move.
The girls are friends again, but will they be there for each other if their dark secrets come to light?
Pretty Little Liars is produced by Alloy Entertainment in association with Warner Horizon Television and is executive-produced by I. Marlene King, Oliver Goldstick, Leslie Morgenstein and Joseph Dougherty.