Iris, the kingdom's only saintess with the power to make plants grow, is forced to marry into a neighboring country after her homeland's defeat in war. Accepting her fate to protect her people, she sets out on the journey, only to be attacked by bandits and sold at an auction. In her despair, she is purchased for 10 billion by Victor, the second prince of the neighboring kingdom, who is rumored to be cold-hearted and ruthless. While Iris feels deep gratitude toward him, Victor mistakenly believes she was sold because of her own attempt to escape him. As their feelings continue to miss each other, their intertwined destinies begin to move forward.