After Takayama's morning shooting practice with Sakurai, the Defense Four (Takayama, Sakurai, Iwaizumi and Haruka) are tasked with finding the Tokyo station bomber's accomplice. Takayama and Sakurai find and pursue him, waiting for backup from the public safety force (PSF). They lose him after he exits the train and runs into a forest and end up spending the night at a station together. Thanks to this, Takayama misses a trip he was planning. In the morning, they find him attempting to board a train at the station. The bomber leaves behind a bomb on the tracks and gets away again. Takayama has Sakurai shoot the rock fall sensors to signal an approaching train. The criminal is later caught by the PSF and they arrive back safely. Sakurai insists on giving Takayama more training, irritating Haruka in the process.