Aria, Emily and Spencer think Mona has regressed to her old bad behavior, but they have no proof, and Hanna has doubts about their claim. Meanwhile, Aria's suspicions about her dad intensify when something important vanishes from her room.

Aria wants to tell Ezra about his son, but she worries that the news might damage her relationship. Elsewhere, Hanna is convinced that Caleb is keeping a secret from her; and Spencer decides she's done with game playing.