On a post-apocalyptic Earth, an angel descends to help the survivors.

In the distant future, the Earth was devastated by a massive nuclear catastrophe. Many years have passed, but the air is still polluted, there is very little water, and the sole survivors are severely deformed by radiation and chemical pollution. Their future seems hopeless in this ruined no-man's-land. Until a mysterious angel decides to help the survivors. A girl with a huge egg appears from nowhere. On her journey through the ruins, she decides to be accompanied by a mysterious soldier... Will he prove worthy to be given a magic egg that can save the world?