一名女大学生突然被杀害，四个与她相关的男人纷纷被怀疑，分别是单恋女学生的警察正勋、曾借钱给死者的高利贷业主明录、死者前男友贤秀以及与死者有婚外情的教授秀泽。当这些人争先恐后为自己辩解的同时，一名女子的身影逐渐变得清晰，她就是秀泽的妻子善华。By day, Jung-Hoon (Lee Je-Hoon) is a hard working police officer and by night Jung-Hoon spies on his beautiful college student neighbor Jin-A (Ko Sung-Hee). Jung-Hoon's life outside of work revolves around his beautiful neighbor. He has her apartment bugged with surveillance cameras and he watches her whenever he is not at work. One evening, Jung-Hoon witnesses a horrifying event. He witnesses Jin-A being strangled to death by her former lover. Jung-Hoon becomes frozen and is unable to call the police due to his own illegal taping activities. Soon, Jung-Hoon becomes entangled with the three other men involved in the life and death of Jin-A.
