Cheng Ye, a modern retired cavalryman, transformed into a horseman in the Tang Dynasty Horse Park. He originally wanted to survive by raising horses, but in the son-in-law competition of Princess Li Mingyue of Changning, he won the first place and became a marquis. Cui Yuandu, the son of an aristocratic family, regarded him as a thorn in his side, but Wei Xuance, a frustrated old general, saw in him the hope of a comeback in the north. Stepping into the power struggle in Chang'an, Cheng Ye discovered that in recruiting a son-in-law, not only the princess's marriage was at stake, but also the Tang Dynasty's borders and the ownership of imperial power.
