The new A is stalking the girls, taunting them with secrets they want to forget, and this A is out for blood.

Aria, Emily, Hanna, and Spencer have been tormented for months by the latest stalker A. All of the girls secrets are out in the open and nothing left to lose except their lives.

Four girls living in a wealthy suburb discover the identity of a stalker who has been sending them shocking text messages, and uncover the mystery of who killed their childhood friend.

Five perfect girls are framed for a murder they didn't commit and must find the real killer.

After their missing friend's body is found and another of their friends commits suicide, four former best friends live in fear of their secrets being exposed by someone who is stalking them via their cell phones.

Fifth grader Penny, who doodles to cope with anxiety, worries that her best friend is drifting away.

High school seniors Aria, Emily, Hanna, and Spencer have all have their secrets. And their stalker 'A' knows everything. A has used their secrets to torture the girls, causing them to lose boyfriends, get kicked out of school, put into jail, and constantly hounded by the press. The Girls are determined to stop A once and for all. Because everybody knows the only way for two people to keep a secret is if one of them is dead.