In 1937, Japan occupied Nanjing, the Chinese capital. There was a battle and subsequent atrocities against the inhabitants, especially those who took refuge in the International Security Zone.
The story is set in the era of the decline of the Shang dynasty (1600-1046 BC) and the rise of the Zhou dynasty (1046-256 BC). It intertwines numerous elements of Chinese mythology, including deities, immortals and spirits.
