Aria and Emily search for "A" at Jenna's lavish birthday party. Meanwhile, Spencer keeps an eye on Garrett, who's out of jail visiting his sick mother; and a brokenhearted Hanna uncovers a surprise.

A conversation with a detective leads Hanna to think she's being framed by "A," so Aria seeks assistance from Mona. Elsewhere, a person from Ali and Jason's past shows up in town unexpectedly.