Pretty Little Liars

Aria, Emily, Spencer, Hanna and Alison have been best friends since the third
grade. They go everywhere together, thinking no-one can come between them. If
anyone is the ringleader of the group it is Alison, and the other girls cannot
help but confide all their secrets to her.

One night, during a sleepover, Alison goes missing. Her body is never found.
The girls mourn her death but move apart after time, assuming their secrets
have disappeared with Alison too.

Three years later and Aria is having an affair with her teacher; Emily is
questioning her sexuality; Hanna is a thief; and Spencer is flirting with her
sister's fiance. They all think their secrets are safe, until they starting
receiving messages from the mysterious A - who knows exactly what they are all
up to, and is threatening to spill the beans . . .