In the quiet town of Qingping, introverted and kindhearted Bai Zhi uses her knowledge of medicine to help the locals in small, quiet ways. While gathering herbs in the mountains one day, she unexpectedly finds a mysterious, injured youth dressed in black, his sharp eyes full of wariness. Though nervous inside, Bai Zhi tends to his wounds with kindness and skill. A silent standoff and cautious probing between them quietly intensifies amid the bitter scent of medicinal herbs. The boy's taut knuckles and the girl's trembling fingertips are like a fissure splitting the daylight: on one side lies a past tempered by the blade, and on the other, a pure and generous heart about to be swept into the vortex of fate...