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Pretty Little Liars

Pretty Little Liars Season 4 Promo: Liars Unite and a “Terrifying” Discovery (VIDEO)

Happy Friday, Pretty Little Liars fans!

“A” is back for an all-new season of psycho stalking, text messaging, and... burying? The Hollywood Reporter exclusively premiered the new Season 4 promo (which you can watch below), and it’s got more “thrills” and “chills” than we can emotionally process right now. The tagline for Season 4 is “Liars Unite,” and judging from the promo, it looks like Mona is Little Liar now. (“I need to find out who Red Coat is,” she says. “She tried to kill all of us.”) But can we trust her?

Something says Spencer will be less-than-thrilled to let Mona into their inner circle, but desperate times call for desperate measures. Perhaps no one knows that better than Spencer, who “joined” the “A” team at the end of Season 3 to help take down Read Coat from the inside. But then spoiler alert! she finds out Mona has never even met Red Coat. Or has she?

In the promo, we hear Aria say, “She set us up.” Is she talking about Mona or Red Coat? Not to mention it looks like we get an immediate answer to what’s inside Wilden’s trunk a “terrifying discovery” that has Emily and Spencer in tears. (Is it just us or does Spencer look the most emotional about this discovery? Could it be Jason’s body? After all, there is a body bag scene seconds later.)

And in the final seconds of the promo, the Liars, plus Mona, receive a startling message from “A” (at a funeral, perhaps?): “The truth won’t set you free. I’m going to bury you with it."

O.M.G. We are so ready for Season 4.

Are you as excited for Season 4 as we are? Sound off in the comments!

Catch the next episode of Pretty Little Liars on Tuesday, June 11, 2013 at 8 p.m. ET/PT on ABC Family.