Mystery Killer 'A' Is Back in Pretty Little Liars: Original Sin Trailer

"A" is back in the new trailer for Pretty Little Liars: Original Sin, in which a new generation of of teen girls find themselves tormented by the mystery assailant.

HBO Max released the new trailer on Wednesday, starring Bailee Madison and Maia Reficco as teens who are made to pay for a secret sin committed by their parents 20 years earlier. The horror-drama serves as a continuation of the original Pretty Little Liars, which aired from 2010 to 2017 on Freeform, but takes place in a new town, with new characters dealing with a different life-threatening mystery.

In addition to its source material, the PLL: Original Sin trailer calls back to classic horror films like Carrie, as this new set of girls works to unravel the mystery and figure out the identity of A.

Pretty Little Liars: Original Sin premieres with three episodes July 28 on HBO Max.

People are talking about Pretty Little Liars: Original Sin in our forums. Join the conversation.

Deena ElGenaidi's writing has been featured in Nylon, MTV News, Insider, The AV Club, and more. You can follow her on Twitter @deenaelg.