Spencer returns from three days of detox only to be saddled with a drug and alcohol abuse counselor named Dean.

While he works on her recovery, she begins to recall what happened the night Alison disappeared and really fears what she might have done.

Plus, A starts threatening her about burying Alison. Det. Holbrook questions Hanna about the letter he received from Paige, and Hanna figures out who wrote the letter when she sees a note Paige left for Emily.

Meanwhile, Aria spends time getting drunk and hooking up with a guy while visiting Syracuse. She returns home to tell Ezra to leave town, and he gives her his manuscript. The manuscript indicates that Ezra believed that A was Alison's mom.