1938, Yunnan border.
Lu Cangming didn't know who his father was since he was a child. His mother mysteriously disappeared when he was five years old, leaving only a worn-out silver ring and the sentence "Wait for the star to return."
It took him twenty years to work from a dock coolie to a military agent, to trace an encrypted letter to a six-petal dark flower, and finally found traces of his mother in the dark alleys of Kunming City——
She is not dead.
She changed her name and used the identity of "Su Hongxiu" to lurk inside the "Chrysanthemum Garden", a spy agency directly under the Japanese royal family, for ten years.
But what Lu Cangming didn't know was——
The Japanese Major Sato Kiichi who fought alongside him was his biological brother. Half-mother.
The seven-year-old boy "Gui" who was hidden in the mountains of Menghai was his biological brother. The blood of the imperial family.
That top-secret dossier, dubbed the "Sun Flag Secret File" by the Japanese military, records the entire truth about a female member of the Japanese royal family who secretly came to China in 1932 and died in childbirth in 1938.
And this secret is enough to overturn the entire war situation in East Asia.
When all the lines converged at one point, Lu Cangming stood on the observatory and finally understood the meaning of his mother's words -
**The return of a star is not the return of a person. **
** Is the end of an era.