Miyuki returns from forensic training in America while Natsumi comes back from Ranger training under the JGSDF. They get tangled up in a plot to kidnap an American-Japanese named Randy Hammond, son of a late millionaire.
Following the failed attempt to kidnap Randy, Kachou placed him under custody of the Bokuto Station, despite objections from Hammond representatives. Natsumi and Miyuki assist Randy in seeing Ikari in order to mend their family ties.
Bokuto station gets excited after Detective Tokuno brings over some taiyaki from a popular shop. But the shop is having trouble as someone has been moving cars off the road and stacking them against the wall.
A string of car break-ins has been going on at different public parking lots, and the Chief of Bakuto Station puts everyone on alert. But this time the guy who has been responsible finds a baby that was neglectfully locked in a car.