Officer Ayaki reporting. Naomi Sakaki--the teacher I met in that school bombing case--has been kidnapped. Some guy named Snail left a ransom note: one billion yen worth of diamonds if I ever want to see Naomi again. What's worse, he's got a big grudge against Himuro for some reason. And now Snail has me running all over town before we make the trade--if I'm not where he needs me to be, no one's going to see Naomi again. But I'm on to this guy, and getting closer--the only thing is, you're never going to guess where the trail finally leads... And there's no way in hell I can solve this one on my own. If I ever needed Himuro, now's the time.