In a vibrant Japanese city during the post-war years, a young dreamer named Kenji feels trapped between his family duties and his desire to be an artist. With a passion burning inside him, Kenji longs to capture the essence of the city's nightlife in his paintings, but the pressure to continue the legacy of his father, a prestigious merchant, seems to suffocate him. Everything changes one night when, after an unusual encounter in an alley, he becomes embroiled in a mysterious festival that is held only once a year.
This festival, filled with lights, music, and traditional dances, comes to life with the presence of spirits and mythical beings that exist only in Japanese folklore. As Kenji immerses himself in this surreal experience, he meets Aiko, a young artist who shares his love and desire to escape. Together, they dive into a magical adventure where they will explore not only the beauty of life but also the shadows that haunt it.
As the night progresses, Kenji must confront family expectations and the decisions that will define his future. His encounters with the creatures of the festival will teach him lessons about freedom, sacrifice, and authenticity. Amid laughter, tears, and dances, this extraordinary experience will change his life forever, leading him to an ending that challenges reality and resonates in his heart.