Everyone has something to hide -
especially high school juniors
Spencer, Aria, Emily and Hanna.

Spencer covets her sister's boyfriend.
Aria's fantasizing about her Englisch teacher.
Emily's crushing on the new girl at school.
And Hanna has some ugly tricks to stay beautiful.
But they've all kept an even bigger secret since their friend Alison vanished.
How do I know?
Because I know everything about the bad girls they were
and the naughty girls they are now.
And guess what?
I'm telling.