Melissa finally tells Spencer what she knows regarding the night Ali disappeared. But what is Spencer supposed to do with the knowledge? Knowing something is off about Alison's story, Emily is on the hunt for answers on her own. She enlists Ezra's help in finding out more about Cyrus and his past connection to Alison. Meanwhile, Hanna asks Spencer and Toby for help with Caleb's drinking problem.
Never trust a pretty girl with an ugly secret. Gossip thrives amid the Mercedes-Benz, mega mansions, and perfectly manicured hedges in the exclusive town of Rosewood, Pennsylvania. Everyone has something to hide. Based off the book series of the same name, the series follows four estranged best friends Spencer, Hanna, Aria, and Emily who are reunited after their best friend and queen bee of the group, Alison, goes missing only to discover they are receiving messages from an anonymous "A" who knows all their secrets.