World's Most Strongest Shinobi: Boruto Uzumaki

Boruto Uzumaki , A 12 year old shinobi who is the son of seventh Hokage Naruto Uzumaki and Hinata Hyuga died on a mission leaving behind his girlfriend Sarada Uchiha and His best friend Mitsuki. While Konoha and somehow the world are mourning over the loss of Boruto, Toneri who was watching over the Shinobi World from the Moon turns back and goes inside a certain room. Just what is in that room and why did he turn back???