Moments after Kato returns from his business trip and steps out of the bullet train, a hostage crisis occurs on the same train. The suspect has taken hostages and, for some reason, begins live streaming his actions on the internet. While the First Investigation Division and Special Forces arrive on the scene, Kato discovers that the suspect is the same young man that was sitting next to him in the train. The First Investigation Division decide that they have no choice but to shoot the suspect, but Kato tries to talk them out of it. However, due to an incident caused by Kato in the past, his pleas fall on deaf ears.

Daisuke locks Takei up in the basement of the Kambe residence. Cho-san interrogates him to find out who the mastermind is behind all of this, but Takei is shook with fear and refuses to speak. Daisuke discovers that the reason why HEUSC is being uncooperative is related to his parents’ research. Kato goes through the documents that Cho-san gathered in his 19 years of investigating the case and finds an important photo.

Aboard the cargo ship headed for Poliador, a terrorist named Weinski relentlessly attacks Daisuke and drives him into a corner. With all his new gadgets disabled, Daisuke finds himself in a pinch but is saved by Kato. They join forces again to escape from the ship. Meanwhile, at the Kambe residence, Suzue determines that the engine of the ship is being powered by a new energy source developed by Shigemaru.