‘Original Sin’ resurrects ‘Pretty Little Liars’ to haunt a new set of teenagers with ‘the sins of the mother’

As if high school weren’t traumatizing enough, “Pretty Little Liars: Original Sin” adds a masked killer into the mix.

The HBO Max slasher show, which is the fourth series in the “Pretty Little Liars” TV franchise, dropped Thursday and follows a group of teen girls as they’re tormented by a mysterious, murderous madman.

“[The girls] are dealing with larger-than-life things, and their lives are literally on the line,” 21-year-old Chandler Kinney, who plays horror movie buff Tabby, told the Daily News. “Especially in ‘Original Sin,’ where our version of [the villain] is cutthroat — metaphorically and literally.”