The annual season bonfire becomes a powder keg when Jenna and Tamara find the boys’ girl-rating tradition known as the Phone Book and announce it to the school.

Jenna tries to focus on her finals after the senior ski trip, but aftershocks from the revelation threaten her chances.

Mona’s friend comes to town to pay her respects.

Aria, Emily, Hanna and Spencer feel trapped and search desperately for a way out of a bad situation.