"Poupelle of Chimney Town" is set in a fantastical, steampunk-inspired world dominated by towering chimneys and perpetual smog. The town is isolated, its inhabitants believing that nothing exists beyond the thick, polluted skies. The story centers on Lubicchi, a young chimney sweep who dreams of seeing the stars, a concept dismissed as a myth by the townsfolk. His father, Bruno, a former sailor, had once spoken of the stars, but his disappearance left Lubicchi with unanswered questions and a longing to uncover the truth.

One Halloween night, Lubicchi encounters Poupelle, a mysterious figure made entirely of garbage. Despite his grotesque appearance, Poupelle possesses a kind heart and a curious nature. The two form an unlikely friendship, united by their shared desire to explore the unknown. As they navigate the oppressive and superstitious society of Chimney Town, they uncover secrets about the town’s history and the lies perpetuated by its leaders. The ruling class, led by the enigmatic Mayor, maintains control by discouraging curiosity and enforcing the belief that the smog is an inescapable reality.

Lubicchi and Poupelle’s journey becomes a quest for truth and freedom. They face numerous challenges, including societal rejection, physical dangers, and the Mayor’s efforts to suppress their discoveries. Along the way, they encounter allies who share their skepticism of the town’s dogma, as well as adversaries determined to maintain the status quo. The narrative explores themes of perseverance, the pursuit of knowledge, and the power of hope in the face of adversity.

The climax reveals the existence of a world beyond the smog, validating Lubicchi’s belief in the stars and fulfilling his father’s legacy. The resolution underscores the importance of questioning authority and seeking truth, even when it defies conventional wisdom. Lubicchi’s growth from a dreamer to a determined explorer, alongside Poupelle’s unwavering loyalty and courage, drives the emotional core of the story. The film’s blend of fantasy, adventure, and heartfelt moments creates a compelling narrative that resonates with themes of curiosity and resilience.