Hanna has some explaining to do to her parents and the police after she’s found with something she shouldn’t have. Mona spills a secret of Spencer’s to the other Liars – leading to hurt feelings amongst the group. Emily tries to help Hanna, only to have “A” turn the tables. And Aria helps out a friend of Mike’s, who gets the wrong impression of her. Meanwhile, Shana keeps popping up in the most unusual places. And Spencer’s investigation into who was on the other end of Ali’s mysterious phone number leads her and Toby to Ravenswood – which is unlike any place they’ve ever seen.

There are mixed emotions in the DiLaurentis household when Charles declares he is coming home for his birthday. Mr. DiLaurentis wants to quickly get out of town to hide Ali and Jason from their brother, while Jason sees this as an opportunity to finally validate all of the early childhood memories he has of “Charlie.” The PLLs are just as split with Spencer and Hanna seeing this as the best chance they have to capture Charles, while Emily and Aria want to stay as far from him as possible. Will Jason be reunited with his brother, or is this just another of “A’s” traps?

Meanwhile, Mona is shutting Mike out and Hanna gets an unwelcomed surprise.

As the girls are forced to stay in Rosewood, questions about the new mystery surface. A restless Aria starts to look suspicious as she heads back to Boston a little too quickly. But could Aria really be the one behind this? As Spencer, Emily and Hanna find themselves back in familiar territory, they aren't happy with going about solving this puzzle "the old way."

Meanwhile, Emily continues to lie about her life in California and Alison keeps a close eye on her friends.