A furnished apartment building, built 7 years ago, a 7-minute walk from the station, close to the city center, and offering a good living environment. A man working for the management company of this popular property harbors wicked desires… The man takes the heavily guarded Master Key. His intention is to break into the apartments where the women live… A young woman, estimated to be 22 years old and appearing to be a student. After returning home, she changes from her casual clothes into a newly arrived uniform resembling that of a mobile phone salesperson. She reads the new employee training manual…