Makino Kaori and Katahira Yuki work for a security company. Yuki is fond of Kaori, who is pure-hearted and devoted to her training. One day, at Yuki's suggestion, Kaori decides to take building security training. There is a rumor that a certain room in the building is haunted by the ghost of an office lady who died in an accident...

A stalker stalks a maid, his behavior gradually escalates, and finally he locks her up in his house. The stalker begins to cut up the maid's clothes... This suspense thriller depicts the full extent of the stalker crime.