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Pretty Little Liars: Original Sin Trailer Introduces A New "A"
HBO Max unveils a creepy Pretty Little Liars: Original Sin trailer introducing a new «A» to the popular teen franchise. Loosely based on the book series of the same name by Sara Shepard and developed for television by I. Marlene King, Pretty Little Liars originally premiered on Freeform in 2010. The series follows the lives of five best friends whose clique falls apart following the disappearance of their leader, Alison. A year later, the estranged friend group reunites as they begin receiving messages from a mysterious figure named «A» threatening to expose their deepest and darkest secrets.