In 1999, tragic events threatened to rip apart a close-knit circle of friends and the small town of Millwood. Twenty years later, a new group of Millwood High students is hunted by an assailant known as "A," who threatens to make them pay for their parents' past transgressions and sins of their own.

In Season 2, our PLLs face down summer school and a new villain — who may or may not have a connection to "A" — ready to put them all to the test.