When Alison brings Mona into her investigation of Taylor, Mona makes a surprising discovery. While preparing for the campus fashion show, Ava comes into contact with Zach, a fellow student with an unexpected connection to her past. And the Perfectionists struggle to recover from recent events.

In the aftermath of a shocking event, Ali, Mona and the Perfectionists try to pick up the pieces of their lives. However, new information is uncovered which makes them question everything they think they know.