Shirayuki is an herbalist famous for her naturally bright-red hair, and the prince of Tanbarun wants her all to himself! The prince from the neighboring kingdom, Zen, rescues her from her plight, and thus begins their love story.

Shirayuki begins her duties as a court herbalist apprentice, but her mentor is a bit odd. He's quiet, shy, moody and...a child? Her first official duty is to quell an illness going around one of the forts that house Clarines soldiers. Will she be able to discover the cause of the outbreak in time?