After the Great Ecological Catastrophe, the ultrarich flee to Mars and leave the rest to perish. But among them a small child who developed immunity to the hostile planet remains. Decades pass and those on Mars venture back to Earth to do recon. When they spot a small human child, The Cub, they immediately try to capture it. This sets off a journey of escape, exploration and discovery through the urban ruins of humanity coupled with frantic cat and mouse chases.

After the Great Ecological Catastrophe, the ultrarich flee to Mars and leave the rest to perish. But among them a small child who developed immunity to the hostile planet remains. Decades pass and those on Mars venture back to Earth to do recon. When they spot a small human child, The Cub, they immediately try to capture it. This sets off a journey of escape, exploration and discovery through the urban ruins of humanity coupled with frantic cat and mouse chases.