Taizan Muto has his eye on the prime minister's seat. He wins the support of a party bigwig and finally attains his goal, but there's trouble ahead.

After switching bodies with his father, Sho ends up in hot water after misreading his speech notes. The pressure is on after only just taking office.

When the switch between father and son is blamed on a technological weapon, implanted microchips that could be affecting their minds are discovered.

Taizan learns that he and Sho are not alone in experiencing the strange phenomenon, then is further shocked to hear that Kuramoto is Erika's father.

The person who stole the technology from the CIA is apprehended. It comes to light that the dentist who implanted the microchips has made contact.

With Sho in critical condition after taking a bullet to save Mai, Taizan prepares to sacrifice himself by switching back to save his son.

Taizan and Sho are happy to finally be back to normal. But Taizan faces a dilemma after Kaibara reveals that he is joining Shiroyama's new party.