When the spring breeze gently blows through the streets of Saitama Prefecture, Japan, the world of Shinnosuke Nohara ushers in an unexpected adventure again.In the latest theatrical version, this five-year-old devil will face an unprecedented challenge - saving the Kasugabe adults who are collectively "rejuvenating"! A sudden "Youth Rhapsody" swept across the town, and Shinnosuke's parents and all the adult residents mysteriously disappeared, leaving only ties and high heels scattered all over the ground.It turned out that they were all bewitched by the magic of the 20th Century Expo, and in the dazzling light of the retro disco ball, they were chasing the phantom of the passing youth. At this fantasy exhibition full of the 1980s style, the barbecue stall drifted with the fragrance of memory, the cassette-style walkman played classic golden songs, and even the poster of Aunt Misae when she was young was smiling on the wall.But behind this nostalgic romance is a huge conspiracy that makes adults lose time and space! Faced with this crisis that transcends the times, our little hero must use all his strength: use his signature hip twisting dance to resolve the numerous mechanisms, and use innocent power to fight against the magic of time.In this adventure that shuttles between reality and memories, Shinnosuke not only wants to save his parents and the entire town, but also will understand the true meaning of growth in laughter and tears. Let us follow the footsteps of this five-year-old philosopher, uncover the secrets behind this dream of youth, and regain the lost beauty in the midst of hilariousness and touching.After all, in this world, perhaps the only one who can save adults may be the child who never plays according to common sense - Shinnosuke Nohara!