The Liars' Club gets a chance to use Cuff on each other, testing the truth of their alibis. Things go askew, however, when the device proves Erika's honesty: she was outside the administration building at the time of the fire, and she saw someone who looked like Wilson running away. Adding to the upheaval is Margot Miller's recovery from her coma. Suddenly, there's someone else who might have information about everything leading up to the fire. The Liars' Club may have narrowed down their suspect list, but the mystery is far from being resolved.

Margot Miller is awake—but isn't taking visitors. That doesn't stop Harper, though. When she finds out that she's not the only Liars' Club member who snuck into the hospital, she goes to talk to Cat to share what she knows. But when The Colvin Cauldron publishes a shocking story about Allie, Cat realizes she may not have all the facts.