The game is afoot! Cat begins her investigtion with her best friend and podcast co-host, Allie. They look over Allie’s super-helpful, super-pink suspect board, which ranks the other Liars Club members' alibis by how suspicious they are. They realize that Naia's alibi is really weak. Not only that, but Allie points out that they don’t know why the professor is so sure the fire was arson. Steeling herself, Cat decides to confront both Naia and Professor Moynihan about their secrets.