Rookie policewoman Mai Kawai is ready to quit the force when the job turns out to not be what she expected, until the arrival of her new instructor Sergeant Fuji causes her to consider sticking around after all.

The chase is the thing! Or so Kawai discovers, when a police dog is brought in to help find a missing old man. Then the chasing continues when the police have traffic control duty during a local marathon.

After Makitaka gets the victim's statement and Minamoto and Fuji spot Yasuda leaving the house, it seems the case is finally over. However, for lack of evidence, they still have to be cautious, which basically takes Kawai and company off the rest of the case.