After receiving an intriguing riddle from "A," the girls embark on a road trip to Ravenswood, where they are surrounded by familiar faces. Later, one of the foursome disappears during a magic show; and a shocking discovery could mean war. Elsewhere, Hanna's joy over reuniting with her mother is cut short; and Toby uncovers something surprising about Wren.

The girls try to figure out who's buried in Alison's grave. Meanwhile, Caleb visits Rosewood; Ezra arranges some secret meetings; and Emily struggles to come to terms with the revelation that Alison is alive.