Aria Montgomery's parents were both mysteriously murdered. It was covered up as an accident, but Aria knows that it wasn't, and she is willing to do anything to find out the truth. Living with her big sister Alison and younger sister Amelia, she investigates her old house, Cimmeria. She uncovers the truth, and ends up in grave danger. She is helped by her best friends Spencer Hastings, Hanna Marin and Emily Fields, as well as her boyfriend Ezra Fitz. When events become too dangerous, the unthinkable happens. Aria's life will be changed forever. Will she make it through alive?