2 years ago, Kyoko's younger sister was murdered. When visiting her sister's grave, Kyoko accidentally ran into a narcotics agent. He told her that he knows about her sister's incident. After Kyoko came home, the criminal of that incident suddenly came into her house. Showing her the picture of that narcotics agent, he said "I'm not the criminal, this is the guy who killed your sister". Kyoko was then told the truth of the incident.

Kyoko的姐姐在一次的警方與槍匪的駁火中喪失了性命。兩年後的那天，她在拜祭姐姐時候遇見了那位在意外中執勤的警員。兩個人的相遇不只讓他們遇上當年的槍匪，卻也讓事情的真相頓時起了變化。