Depiction of Japan's economy, based on Shoutarou Ishinomori's epynomous manga.

Hatching an original idea is not always easy for the Heaven's Design Team. With a meticulous client such as God, even the most confident of its members may doubt their ability to create a perfect creature that satisfies his demands. The whole team is then put to the test when God requests a single animal possessing five particular qualities. This strange animal may be one of the design team's biggest jobs yet!

Set in an Eastern fantasy setting, Dān Fěi and her brother, guardians of a sword known as the Tiān Xíng Jiàn, are pursued by the evil Xuán Guǐ Zōng clan, who seek to obtain the sword for their master, Miè Tiān Hái. While her brother is defeated, Fěi, who possesses the sword's crossguard, escapes and finds herself in the care of the wandering swordsman, Shāng Bù Huàn, and a mysterious man named Lǐn Xuě Yā, who become her protectors from the pursuing Xuán Guǐ Zōng clan.