Previously on pretty little liars (episodes 14 and 15):
- Mona is acting innocent.
- Toby is acting creepy.
- Aria's Dad is possibly evil.
- The girls find Ali's diary and discover that Ali was blackmailing Byron for money - they were supposed to meet the night she died.
- The clerk from Lost Woods Resort shows up as a custodian at Rosewood High. They find the diary in his office.
- There's a brain and a knife in Mona's locker. Mona struggles to maintain control.
- Mona sends out a video pleading for understanding.
- Aria still won't tell Ezra about his kid.
- Mona and Meredith are in a storage shed at a fundraiser race when the shed combusts into flames. Meredith's arm is rather badly burned, but Mona is fine.
- Mona and Toby are conspiring.
- Toby tries to hit Lucas with a truck.
- Paige has issues with fright.
- Aria's Dad is acting creepy.
- Mona and Jason are hanging out.
- Jason was the one Aria stabbed with the screw driver?! Mona bandages his wound.
- Mona beat Spencer to be president of some academic club by tricking her into overconfidence.
- Hanna gives Mona the SMACK DOWN!!!
- Lucas was the one who set the fire in the shed, not Mona. Mona has been blackmailing Lucas. He leaves school. He thinks she tried to hit him with the truck, not Toby.
- Toby slits the tires on Paige and Emily's car. Emily gives chase through the woods, but gives up.
- Meredith reveals to Aria that she knew that Byron had left to "beat" Alison. She has been fighting with Byron because he won't tell Aria the truth. They agree to confront him with the diary pages.
Yesterday's episode:
- Mona and Toby have a PLAN.
- Aria has a fever. Meredith is nursing her back to health and being sympathetic.
- Hanna is preparing for a job interview doing some fashion-y thing.
- Paige has agreed to see someone about her fears.
- Hanna catches Caleb talking on the phone to someone about her and Mona. She persuades Emily to follow him after school.
- Meredith has stollen Aria's phone and is lying to Ella about her health.
- Spencer and Spencer's mom tell Toby that they are going to be at some celebratory thing for Spencer's dad, when really they are planning to set up a special anniversary dinner in Toby's apartment.
- Emily gets the keys from Toby and calls Spencer so that she can come over and bake an anniversary lasagna.
- Hanna shows up at the interview place. No one is there. A shows up in a hoodie. Hanna freaks out. A knocks over a bunch of mannikins on her and runs out, leaving behind a key with the tag "A" on it.
- Emily follows Caleb to a cafe. He sits at a table, waiting for someone. Before Emily can see who, Hanna texts her about A and wants her to come.
- As Emily walks away, we see that he was about to meet with Paige. Paige says that she keeps wondering when the next bad thing will happen, but she realized that she's not afraid for her, she's afraid for Emily. She thinks Emily is too numb to the danger. Caleb shares her concern - they want to take A down.
- Toby shows up at Spencer's house to give her anniversary flowers. He sees the A key, and Spencer lies that it's a key to a storage unit at Melissa's work. She puts it in a drawer. Toby leaves.
- Aria dreams(?) that Ali comes to visit her and takes the Ali doll out of the closet and puts it on a stool. Ali confesses to blackmailing Byron. She tells Aria she can see A everywhere she turns. Before leaving, she warns for Aria not to drink the tea Meredith is giving her.
- Aria wakes up. She sees the doll still on the stool. She goes to open the door, but it is locked. She is trapped.
- After trying unsuccessfully to pick the lock to her door, Aria smashes a mirror and takes a jagged piece of glass in a cloth as a knife. She goes back in her bed, clutching the weapon.
- Emily and Hanna walk around and notice Meredith fighting with a clerk in a pharmacy. Meredith wants to by sleeping pills, but she has already fulfilled her prescription for that week. Meredith settles for 10 packs of sleeping drops.
- Concerned, Emily and Hanna decide to check on Aria.
- Aria wakes up to see Meredith standing over her holding Aria's mirror-knife. Meredith acts crazy. Aria runs downstairs and tries to call the police, but the signal is lost in the storm. Meredith comes up behind her and knocks her out.
- Emily and Hanna knock and knock. Eventually they use their copy of Aria's key to go inside. They call and go in her room, but she isn't there.
- Hanna decides to call her. They jump when the phone rings behind them, and they find Meredith, who acts creepy. Meredith leads the girls to the basement where Aria is supposedly "looking for flashlights." The door is locked behind them.
- They find Aria unconscious at the bottom of the stairs. They try to shake her awake.
- Toby-as-A breaks into Spencer's house and tries to look for the A-key. Spencer confronts him, having figured out that he was evil when she saw his fake license as a doctor at the Radley Hospital where Mona had been kept.
- Spencer slaps Toby. Her mom calls, distracting her, and Toby runs away. Spencer cries.
- Hanna, Emily, and Aria are in Aria's basement. Aria's dad pulls up in the driveway, earlier than he was supposed to be home. Was he in on it, or had Meredith just called him?
- Meredith tells Byron that Aria and her friends have proof of the blackmail. Byron knocks on the basement door. Hanna and Emily pick up pokers as potential weapons.
- Byron comes down and tells them not to be afraid. He said he didn't bring the money to Alison. As he left, he saw Melissa on the back porch of Spencer's house, yelling into her phone.
- Aria and Byron talk. Meredith has disappeared. Byron wants to talk to the police about the blackmail thing. Aria decides that she believes her dad, and burns the diary pages.
- Spencer knocks on Toby's apartment door, crying and begging.
- Inside, Mona-in-a-hoodie eats the anniversary dinner Spencer had so lovingly prepared for Toby.
