Centuries of warfare and ecological collapse have rendered Earth uninhabitable. Humanity's answer was the aero police: a massive floating city where genetically modified animals evolved into sentient beings who walk upright and speak. Now these hybrid creatures live in manufactured peace, their civilization thriving high above the ruined world below. No one remembers the surface anymore. No one questions it. Until a group of curious kids discovers something impossible: a seed from the dead world outside their city walls. What grows from this mysterious object becomes the catalyst for everything they thought they understood to unravel. As they investigate the seed's origins, the kids begin asking dangerous questions about their isolated existence and what really lies beneath the clouds. Their search for answers pulls them toward a truth the aero police has kept buried for generations, forcing them to confront what humanity abandoned and what nature might still hold. An adventure rooted in environmental reckoning and the stubborn curiosity of youth, this film asks whether a civilization can truly escape its past by building walls high enough.