When the discovery of a new piece of evidence about Alison's disappearance brings the FBI to town, the last thing the girls want to do is go "glamping" (glam camping) for Mona's birthday party. But when they get a text that insinuates that "A" will be at the party, Spencer gets the idea that it will be their chance to finally put an end to the threats. Once at Camp Mona, not even the mani/pedi station can lift the girls' spirits when the evening takes a dangerous turn. Meanwhile, the Marin financial situation is pushing Ashley to the brink.