After the fourth war, Naruto won the war and Naruto was declared as the hero and was the one who saved the hidden leaf village. After the war Naruto was nowhere to be found. At first everyone thought that Naruto was in his apartment resting because he did the most fighting in the war, But after 2 days the Hokage went to Naruto's apartment and it was empty, nothing was there except for a single journal.
The Hokage panicked knowing that Naruto is a strong person with the tailed beast inside of him, If Naruto went missing he would me known as a S- Missing Ninja, The Hokage thought that Naruto joined the Akatsuki or even worse he was part of the Akatsuki. The Hokage went around Naruto's apartment trying to find him or something but to her luck there was nothing, only a journal that was locked with steals. The Hokage went to the Hokage Tower and called everyone that knew Naruto and some of the other sensei to come to the Hokage Tower. Everyone came wondering where Naruto is and what happened since they where called to come to the Hokage Office that meant that there was some thing important or something happened