Clara Reichert only wants to spend a casual evening babysitting in a rich family’s house, when she gets a new follower for her Instagram account. But this one is different. This one is not easy to shake off. Even as Clara calls her boyfriend Patrick for help, the situation is only getting worse, because the follower has anything but good intentions. He follows her not only in the digital world – he stalks in the real world too. While Patrick is on his way to save her, she barricades herself inside the house.