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.

A look back in time at the events that set everyone on their current paths. Rena's envy for Yuki drives her to a desperate impulse. Manager Yamamoto and Nikaido Rui race to hide a corpse.

Rena and Sato confirm their suspicions about the motivations of Yuki's true murderer, and race to confront the suspect so they can close the case.