Aria, Emily, Hanna and Spencer have been burned before by newcomers to Rosewood, so it's no surprise the four ladies are wary when someone new crosses their path. Spencer lets down her guard a bit as she spends more time with Jonny, and Emily continues to try and figure out Talia as she keeps getting mixed signals from her co-workers. When Mona's friend Lesli shows up in town, Hanna is tasked to get her back story and find out if Lesli is really who she says she is. Are the girls wise to keep an eye on everyone, or can they allow a bit of comfort room without worrying it is an "A" trap? Meanwhile, Aria becomes concerned about Mike's recent behavior and Holbrook returns to town.