Ep 13. How the 'A' Stole Christmas

In the season 5 episode 13 of Pretty Little Liars, titled "How the 'A' Stole Christmas," the girls are getting ready for their first Christmas without Alison, who has disappeared once again. As they prepare for the holiday, they receive a surprise message from 'A' inviting them to a special Christmas event at the ice ball.

Despite their fears and reservations, the girls decide to attend the event, hoping that it may give them some clues about 'A's true identity. The ball is held at the ice castle, and the girls are taken aback by the beautiful decorations and festivities. However, as the night progresses, they start to experience strange and terrifying events.

One of the most notable events is that Mona, who was thought to be dead, is present at the ball, appearing as a ghost. While the girls try to ignore this, they start to suspect that Mona may have faked her own death and could be 'A.' They also encounter a strange-looking Santa Claus, who they suspect is also 'A.'

As they try to uncover more about 'A,' the girls are surprised to receive presents from him. They receive gifts that are both eerie and personal, with each gift having a hidden message for the girls. These messages reveal that 'A' knows a lot more about their past than they had anticipated and that he is willing to use it against them.

Meanwhile, Spencer is still dealing with her drug addiction and starts to feel the pressure of keeping it a secret from her friends. She is also struggling with her feelings for Toby, who she has been avoiding since they broke up. Aria, on the other hand, is dealing with the aftermath of her breakup with Ezra and is struggling to move on. Hanna is still trying to find out what Caleb is hiding from her, and Emily is trying to come to terms with Alison's disappearance.

As the night progresses, the girls start to realize that 'A' has planned a dangerous game for them. They are trapped inside the ice castle and forced to play a game of "Secret Santa," where they have to reveal their darkest secrets in order to escape. The game becomes increasingly dangerous, and the girls are forced to confront their deepest fears and secrets.

The episode concludes with the girls escaping the ice castle, realizing that their lives will never be the same again. They are left with more questions than answers about 'A's identity, and they are all wondering what the future holds for them.