Pretty Little Liars: No longer just wanting to sit by and wait for "A's" latest cruel attack, Aria, Emily, Hanna and Spencer take matters into their own hands and try to finally put a stop to their tormentor. As relationships are put to the test, new and old secrets are revealed and the stakes are raised higher than ever before as the Liars come closer to the truth. Will all of their sacrifices be worth it in the end?
Aria watches over Ezra at the hospital, while Alison and the others set a trap for "A."
Emily, Spencer and Hanna try to adjust to the new normal; Kenneth searches for Jessica.
Alison struggles with the death of her mother, as the Liars try to navigate through her new lie.
Alison attempts to regain her position as leader of the gang upon her return to Rosewood High.
Alison returns to Rosewood High and attempts to repair the damage she inflicted years earlier.
The girls look out for Alison's safety after she is spooked by a recent Rosewood "accident.''
Aria searches for information on a patient; Spencer borrows Ezra's spy equipment.
Hanna is pushed down a dark path after Alison moves in; Aria fails in her duties as maid of honor.
Hanna's drinking gets out of control; Emily looks for information linking Alison to Noel.
The Liars try to prevent Alison from sending an innocent man to jail; Hanna seeks a normal life.
Melissa reveals her knowledge of Alison's disappearance to Spencer; Emily seeks Ezra's help.
Aria, Emily, Hanna and Spencer feel trapped and search desperately for a way out of a bad situation.
The girls try to clear Spencer's name; Alison encounters a ghostly presence.
The Liars try to prove that Alison was involved in Mona's death; Aria worries about her future.
Toby is conflicted when a surprising piece of evidence arrives at the police department.
Aria attempts to summon the courage to tell Ezra the truth; Hanna covers for Ashley.
Hanna refuses to let "A" frame her for Mona's murder; Spencer's actions put Toby in a bind.
Hanna enters a beauty contest and turns to Emily for help; Aria asks Andrew to keep an eye on Mike.
The Liars work to protect Mike and get Alison released from jail; Spencer travels to London.
Alison is offered a plea bargain if she names one of the Liars as her accomplice.
Spencer, Aria, Emily and Caleb hunt for information that will clear Hanna.
The prosecution calls a surprise witness in Alison's trial; the girls hunt for last-minute evidence.
Shocking secrets come to light for the Liars as the biggest clue to the "A" mystery is revealed.