The Liars are being haunted once again by a mystery tormentor as the search for Charlotte's (Vanessa Ray) killer continues in the next episode of "Pretty Little Liars" season 6.

By the end of the previous episode, the Liars all received a text message saying, "You know who did it and I'm going to make you talk." But unlike the ones that they received back in high school when the messages came from "A," the new sender ended it with a devil emoji.

It seems like Aria (Lucy Hale), Hanna (Ashley Benson), Spencer (Troian Bellisario), and Emily (Shay Mitchell) are going back to the time when all their movements were being followed by a mysterious person.

In the trailer for the upcoming episode titled "New Guys, New Lies," the Liars appear to be doing their own investigation to find out who really killed Charlotte so they can go back to the lives that they already established after they left Rosewood five years ago.

The trailer also shows that each of them is prying around to help them find proof that will lead them to the identity of the killer. Aria and Emily found a set of golf clubs that they believe was used as the murder weapon, while Spencer and Caleb discovered a storage where a phone and a hoodie were kept.

The official synopsis for the episode (via Wetpaint) reads:

"With the Rosewood P.D. breathing down Hanna's neck about The Radley security footage, she opts to confess the truth to those closest to her in hopes they can help. Aria continues to search for answers, with help from Emily, on whether Ezra is as guilty as he seems. Meanwhile, there is awkwardness all around when new love interests emerge and old ones resurface."

The 14^th episode of "Pretty Little Liars" season 6 will air on Tuesday, Feb. 2, on Freeform.