Still reeling from the trauma of Hanna's abduction and dark fate, the Liars must shift their focus to another one of their own. In order to protect Alison from Uber A's threats, the PLLs snap into action at a chance to rescue her from the hospital. However, in doing so, they make a deadly mistake that changes everything.

Jenna returns to Rosewood and befriends another one of the Liars' enemies, making her the PLL's number one suspect for Uber A. In order to leave the psychiatric hospital, Ali must be released into the care of a relative, leaving her under the suspicious watch of Mary Drake. Spencer enlists Hanna's help to search for Caleb as he's missing in action. Aria and Emily stumble upon a secret apartment they hope will lead them to more answers.