If you’ve been on and surfing (yes, surfing) the internet long enough, you’ve probably come across tales of the urban legend known as Slender Man, a tall, faceless creature who apparently inspired two twelve-year-old girls to stab their friend and leave her for dead in Wisconsin back in 2014.

The girls are now being tried as adults for first-degree murder, and HBO has a new documentary called Beware the Slender Man that follows their case. People are hungry for true crime stories right now, and mixing one with a prolific internet urban legend seems like it’ll draw some big numbers for HBO. And with the indie Slender Man game still a hit, why not capitalize on this?

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After premiering at last March’s SXSW Film Festival, HBO has set a January 23 premiere date for Irene Taylor Brodsky’s Beware the Slenderman documentary.

Shot over 18 months with heartbreaking access to the families of the would-be murderers, the film plunges deep down the rabbit hole of their crime, a Boogeyman and our society’s most impressionable consumers of media. The entrance to the internet can quickly lead us to its dark basement, within just a matter of clicks. How much do we hold children responsible for what they find there?

Here’s the creepy trailer: