Philip, a young proofreader, has been prisoner of his apartment for two years convinced that an evil force wants to take possession of his soul. Only once he meets Sonia, the girl from the upper floor, he starts to open his eyes and realize that maybe everything he has been living is just made by his own imagination. But still nothing is how it looks: a well conceived ‘mind trap’ by an unknown entity forces him to face the dark once for all.