Five children of UN ambassadors are called by the Earth to imagine a new sustainable future for our global society. From within the Earth's center (limbo space), they work together to reduce humanity's global carbon footprint by exchanging stories and experiences from their parents' world. Collectively they decide to scale back existing technologies and create sustainable designs that lead to a steady decline in global carbon. However, the Earth's systems have already reached a critical point which could result in an irreversible climate crisis. Can the children respond to the Earth's urgent message in time to prevent this catastrophe?