19-year-old private detective Rena is assigned to train the clumsy new hire Sato. After Sato is attacked on a job, they take shelter in a nearby restaurant, where owner Taeko asks them to investigate an odd taxi driver she knows named Odokawa...

The body of the real Mitsuya Yuki is found, and all the threads start to come together. Rena confronts Nikaido Rui as she closes in on the truth.