Hanna comes up with a desperate plan to save her mother from a conviction and turns to the only person she thinks can help – Mona. Caleb tries to convince her Mona can't be trusted, causing Mona to prove her loyalty in the most unexpected way. And Spencer returns to an old haunt to investigate new evidence relating to Wilden and his surprising ties to another mysterious death. Meanwhile, -A's recent machinations take their toll on Emily and her mom, driving Emily to reconnect with her old boss Zoe (a charity organizer who previously worked with Emily) to look for an escape. And Aria relies on Jake to help her understand Mike's new attitude, leaving them both confused about the nature of their relationship.

With Hanna occupied because of her mom's upcoming trial, Aria, Spencer and Emily band together to continue to investigate Wilden for information that could be used at Ashley's trial.

Caleb and Toby team up to investigate -A and what really happened the night of the lodge brand and encounter a bron that points to a new possible identity for Red Coat. Hanna struggles to act like everything is normal and her vrienden are unsure about how to help her. Aria worries about Mike's behavior in light of an incident at school and Ezra struggles with how he now fits into her life. Meanwhile, The Liars are determined to find a new suspect in Wilden's murder and their tactics have unintended consequences. And, -A's new plan threatens to send everything crashing down around one of the Liars.

Spencer and Emily make plans to visit a nearby college, but they have very different agendas for their time spent on campus. Spencer's singular focus in figuring out Ali's apparent connection to the school contradicts Emily's real fears about her plans for after she graduates. And after a stinging attack door "A," Aria and her brother Mike don't see eye to eye regarding what's best for their parents.
Meanwhile, Hanna becomes increasingly frantic when she makes another horrifying discovery among her mom's things, leading her to make a desperate verplaats - with disastrous results.