After a sudden time slip to Shang-era Chentang Pass, Yin Yuhan finds herself stranded, and reunited with her destined husband, Li Jing. Together they defend the garrison against an invasion from the sea. With her modern ingenuity, she uncovers a hidden conspiracy, locates an ancient artifact, and arms the defense with gunpowder. In the final clash, she gives her life to save countless others, only to be reborn through the Vermilion Bird’s fiery grace. Yin and Li prevail. Peace is restored. But deep beneath the waves, a new threat awakens…