In the prosperous Tang Dynasty and Kaiyuan Dynasty, there was an undercurrent under the prosperity. She is an orphan girl from a dyeing shop who travels through the streets of Chang'an, and she is also the legendary messenger on the Silk Road - the "Crimson Thread". No one knew that what she held tightly in her hands was a lost secret recipe that was enough to dye the color of an emperor, a shocking secret that could detonate the business lifeline of the Silk Country.
When the secret recipe was leaked, overnight, she became an orphan hunted by three parties. The cunning imperial spies, the greedy Nine Surnames Hu Chamber of Commerce, and the mysterious Persian assassins, from Chang'an's Suzaku Street to the dusty bazaar of Samarkand, an invisible giant network is tightening around her.
There is only a thin line between loyalty and betrayal, and survival and mission are intertwined on the tip of the knife. In the lies covered up by the yellow sand, A Fei must use wisdom as a blade and life as a bet to find the only crimson thread that leads to the truth and self-salvation.
