Pretty Little Liars - 2010

Predicated to young adult novels from Sara Shepard's Pretty Little Liars series, the show follows the lives of 4 girls -- Hanna Spencer, Aria, along with Emily -- whose clique drops after their queen bee, Alison's disappearance. One year after they begin receiving messages from someone with the name"A" who threatens to expose their own keys -- for example long-hidden ones that they thought just Alison knew.