Clara Reichert just wants to spend a casual evening babysitting in the house of a rich family when her cell phone notifies her about a new instagram follower. But this one is different from the others - and is no longer easy to shake off. Even when Clara calls her friend Patrick for help, the situation only gets worse because the follower has anything but good intentions. Later on he does not only follow her in the digital world - but also in the real world. While Patrick is on his way to try to save her, she tries to barricade herself in the house.