Aria is down for the count when sidelined by the flu, so Hanna and Emily are on their own to follow up on a new clue. Surprisingly, Meredith steps up to help take care of Aria while her father is away, but when it starts to look like Meredith may have ulterior motives to her nursing Aria back to health, Hanna and Emily turn their attention towards saving their friend. Is Meredith just trying to start anew with Aria and be her number one fan, or is there reason for her friends to be concerned? Meanwhile, Spencer takes a break from all the sleuthing to surprise Toby for their anniversary.