Shirayuki, a talented herbalist with unusual red hair, runs her own apothecary shop until Prince Raji of Tanbarun demands she become his concubine. Refusing to surrender her freedom, she cuts her hair and escapes, crossing paths with Prince Zen Wistalia of neighboring Clarines. Inspired by their meeting, Shirayuki pursues a position as a court herbalist in Clarines, determined to forge her own path while navigating royal politics, blooming romance, and personal growth. As she and Zen grow closer, they must balance their deepening relationship with their individual aspirations and duties.