A new piece of evidence leads the police to officially announce that Toby Cavanaugh is wanted for the murder of Alison DiLaurentis, though Emily, Spencer, Aria and Hanna have their doubts they've nabbed the right suspect.

Meanwhile, Spencer tries to mend fences with sister Melissa, just as her ex Ian suspiciously re-enters the picture. Aria begins to have feelings for Noel that complicate her relationship with Ezra even more. Emily's father comes home early from his tour in Afghanistan, while Hanna's mother Ashley grows increasingly desperate about their financial situation.

When Hanna is abruptly dumped from the guest list of Mona's birthday party, the rest of the girls plan to attend to scope out the scene and see if "A" is also in attendance. Later, Hanna sneaks into the party and finally spots the elusive "A" leaving behind a clue. Her discovery yields possibly fatal results, though, because she's quickly ran over with a car!