Salem is known for its witches, first and foremost, then Sabrina The Teenage Witch's talking cat. New film Assassination Nation attempts to add to the city's legacy with an altogether less spooky, but much more terrifying, idea – a hacker exposing all your secret emails and messages for everyone to read. This is what happens to teenagers Lily, Bex, Em and Sarah, who eventually find themselves defending not only their secrets, but their actual lives, against an angry, violent mob out to get them – and everyone else. Think Spring Breakers meets Black Mirror and you're half-way there to imagining this millennial nightmare.