In 2016, a meltdown of a nuclear power plant creates a big catastrophe in Tokyo. 20 years later, the city has become a ghost town due to the high levels of radiation. From that area a distress signal is received. The Self Defense forces dispatch three girls from the special unit Coppelion to search for survivors. But why aren't they wearing any protection against radiation? The episodes are: 'Puppet (Coppelion)', 'Future', 'Hope', 'Sunset', 'Life', 'Planet', 'Haruto', 'Sisters', 'Diversion', 'Human', 'Awakening', 'Promise' and 'Angel'.