Taizan Muto (Kenichi Endo), who is approaching retirement, once again has the opportunity to be prime minister.However, he encountered changes one after another, and his secretary Saejima Yuka (Ano) and the young man Kinoshita (Soda Ryosuke) who was involved in the black market exchanged identities with him one after another!After investigations by Nitta Ri (Keiya Yamauchi) and Nekota (Satoma Yamatoki), it seems that there is a shady secret of the US government behind this series of events.At this time, the successfully re-elected US President Bagler made an emergency visit to Japan.

After consultation with Chief Cabinet Secretary Kariya Koji (Kaneda Akio), Tanaka Maruichirota (Ohashi Kazuya) and others, they believed that Baghel's visit to Japan was not coincident with the exchange incident, but had another purpose.However, the exchange incident happened again, and Taizan Muto actually exchanged souls with five-year-old kindergartener Shinta Hayase (Nagisa Yoshimoto)!

As he is about to meet with Baghel, Tarzan transforms into a five-year-old child (Shinta's face).Naturally, he could not attend the summit as a child, so he had no choice but to play with the children in the kindergarten.On the other hand, Shinta (Tazan's face), who inexplicably entered the Prime Minister's body, lived as he pleased, playing horseback riding games with Ichirota and coquettishly asking for hugs from Yuka.

At this time, the Countermeasures Headquarters identified the circulation path of the brain wave chip related to the identity exchange and found that it may be mixed with ym.Tarzan, who feels the limit of living with Shinta's body, decides to leave the kindergarten and head to the meeting site with Bugle...!?