Aria was a talented alchemist, but was forced out of her position as a court alchemist due to a plot by her half-sister. Lost in the forest with nowhere to go, Aria is reunited with her old friend Yuren, who had also aspired to become a smith. There she learns that Yuren is the third prince of a neighboring country, and she is invited to move to the neighboring country! She is welcomed as a court alchemist in the neighboring country, and together with her new friends, she begins to tackle difficult alchemy, but suddenly an assassin attempts to kill her--!