Although she has doubts, Nike, the fourth princess of the Rain Dukedom with the rare talent of summoning the rain, sets out on a mission to marry Sun King Livius and protect her country's fate. As she enters the Sun Kingdom, she is shocked to discover that the leader who took over the world in only three years after his crowning is just a young child! Additionally, she is taken aback when he orders her to make it rain, seemingly oblivious to the significance of her ability.