In a dystopian and grim future, humanity has been nearly eradicated, and the few survivors have grouped together in an underground community suffocated by fear and despair. In this decaying world, the only promise of escape lies in a strange and mystical object that is said to be able to transport those who touch it to a new world, free from oppression and destruction. However, the truth behind this legend is uncertain and fuels paranoia among the inhabitants of this society.
The protagonist, a young man named O-bi, is a dreamer who longs to escape the claustrophobia of the underworld and discover if there is anything beyond the walls that have imprisoned him his entire life. However, his quest for the truth leads him to face a moral dilemma: the discovery of a secret about the object could alter not only his fate but also that of his community. As his friends and leaders struggle to maintain control and hope in a bleak future, O-bi must decide whether to follow his instincts and challenge the status quo, or conform and give up his search.
With a captivating visual style and deep allegories about civilization and human nature, the film becomes a powerful reflection on hope and disillusionment in times of crisis. As the times darken, the question that lingers is: what does it truly mean to be human?