Japanese sci-fi anime. Retro and Pandy, two of Earth's last survivors, wake up outside a city, naked and suffering from amnesia. They manage to get themselves some clothes, some food and a car. But then they are arrested and sent to jail after a shoot-out with the police, and for their punishment they are sent to Dead Leaves, a penal colony on the Moon that is notorious for mistreating its prisoners. Retro and Pandy plan their escape, trying all the while to bring back their precious memories.