Emma, a graduate student living alone in NYC, is being watched by a stalker who hacks into the technology that surrounds her - laptop, cell phone, and other web connected devices. This obsession continues to grow as the hacker records Emma's most intimate moments. When the thrill of watching isn't enough, the situation escalates to a dangerous and terrifying level.

Set in the fictional town of Rosewood, Pennsylvania, the series follows the lives of four girls, Aria Montgomery, Hanna Marin, Emily Fields, and Spencer Hastings, whose clique falls apart after the disappearance of their leader, Alison DiLaurentis. One year later, the estranged friends are reunited as they begin receiving messages from a mysterious figure named "A", who threatens to expose their deepest secrets, including ones they thought only Alison knew. At first, they think it's Alison herself, but after her body is found, the girls realize that someone else is planning on ruining their perfect lives.

Danny Stein is a high-school senior and class vice president; he's in charge of the prom, along with Camille, his best friend for years. Everyone including Camille and her parents assumes that Danny will ask her to the prom, but he wants something less platonic and more romantic - more memorable. His choices include the sophomore cheerleader he drives to school, a friend of a friend, and a quiet Chinese girl in his classes. With his parents' help (they're going through a divorce), he gets the tickets, rents a tux, reserves a limo, and, over his mother's objections, gets a room at the prom-site hotel. This, everyone believes, is the way to establish memories. Will anything work out?

Southern California high school senior Carson arrives at the all-important "Cheer Camp Nationals" determined to lead her squad, the West High Sharks, to victory. But chic New Yorker Brooke and her team, the East High Jets, are equally steadfast in their pursuit of the competition's coveted "Spirit Stick." As tension mounts between the two rival squads, Carson falls for fellow cheerleader Penn, not realizing he's a Jet. When Brooke discovers the budding romance, she raises the stakes by challenging Carson to a one-on-one cheer-off. A spectacular "cheer fighting" sequence erupts into a no-holds-barred brawl and cheerleaders on both sides are suspended from the competition. With their dreams of taking home the top prize all but shattered, the leaders of both squads realize they'll have to take drastic measures to stay in the game.