The psycho is from the beginning a complete dangerous person. He seems to be on a screw loose and has murdering intentions. The psycho ends up working as an intern in an office but he becomes obsessed with a manager there. She's a so-called "tough independent" woman although doesn't have any actual brain cells when it comes to this psycho. She doesn't mind him sneaking around her house, nosing in her private things or getting creepy. She has to be the dumbest woman on film.