Jessica is one of the more tragic stories in the first season. She and Hannah become fast friends until Jessica and another friend, Alex, start to date behind Hannah's back. A list ranking the body parts of girls in school, written by Alex, eventually drives them apart for good. That's not all that's on the tapes, however — it's also revealed that Hannah knows Jessica's current boyfriend, Justin, let Jessica get raped by his best friend, Bryce, when she was wasted at a party.
After the tapes come to light, Jessica begins to go on a pretty steep downward spiral and eventually breaks up with Justin. The season two trailer hints that although she might have fixed things on the outside — perhaps with a trip to Oakland, judging from that postcard on her desk? — that she's still experiencing inner turmoil. The fact someone spray painted the word "liar" on her window might have something to do with it.