Set in an alternate post-war Japan divided between the American-occupied south and the Soviet-controlled north, *The Place Promised in Our Early Days* follows three
childhood friends bound by a shared obsession: a mysterious, towering white monolith constructed by the Union in Hokkaido. Hiroki, Takuya, and the ethereal Sayuri spend their youth dreaming of building a plane, the Bella Ciela, to fly across the border and touch the structure. Their innocent pact is shattered when Sayuri suddenly falls into a deep, unexplained coma, prompting the boys to drift apart. Hiroki moves to Tokyo, burdened by the hollow void of her absence, while Takuya becomes a physicist working on classified government research.Years later, the
geopolitical tension reaches a breaking point. Takuya discovers that Sayuri’s unconscious mind is inextricably linked to the monolith, which is actually a terraforming device capable of rewriting reality. As the Union prepares to activate the tower, threatening to consume the world in a wave of distorted space-time, the government intends to destroy the structure, an act that would inevitably kill Sayuri. Upon learning she has awakened in a catatonic state, Hiroki abandons his life in Tokyo to reunite with Takuya. Driven by a desperate, singular promise made years ago, the two men reconcile their fractured friendship to finish the Bella Ciela.The climax unfolds as Hiroki maneuvers the fragile aircraft toward the soaring tower, determined to rescue Sayuri from the center of the phenomenon. As they soar through the surreal, shifting skies, the boundary between their memories and the shifting reality of the tower begins to dissolve. Hiroki reaches Sayuri, and together they witness the tower’s activation, which threatens to erase everything they know. Through a profound emotional connection, they halt the cataclysm, forcing the tower to revert to its dormant state. The film concludes with the three friends reunited in a landscape forever changed, reflecting on the fragility of their dreams and the bittersweet nature of a promise kept against the backdrop of a world that refused to let them remain children.