The maxim “The past will cause issues down the road for you” is never more valid than for Aria, Spencer, Hanna and Emily. As the young ladies attempt to pay tribute to Alison’s memory, the four companions are confronted with uncertain issues. Aria has an unsettling experience with her dad’s previous escort, Meredith. Emily is compelled to see Toby Cavanaugh in another light. Spencer is reeling in the wake of a vindictive Melissa. Also, Hanna is frantic to have her beau, Sean, overlook the “old” Hanna. With “A” provoking them at all times, the young ladies progress and abandon the past? In the interim, Detective Wilden utilizes his new association with Hanna and Ashley to his profit. Be that as it may, will he find the solutions he’s searching for by making himself at home in the Marin family unit?