Presentation of characters

One year after Alison Dilaurentis's disappearance, the city of Rosewood is slowly learning to live with this unfinished mystery. While her four friends are trying to rebuild their lives, someone may be taking over their destiny.
Between love, friendship, lies and betrayal, will they succeed in gaining the upper hand against this person who seems to know the least of their secrets and who will do everything in his power to ruin their lives ?