Maquia belongs to an elf-like race called the Iolph, who live for hundreds of years while maintaining a youthful appearance. One day, the peaceful existence of these people is shattered by an invasion of humans seeking Iolph blood believing it will gift eternal life. Maquia manages to escape but as she flees, she discovers an orphaned human baby; she decides to raise him as her own, naming him Erial. But as the boy grows older and he becomes aware that Maquia doesn’t age, their relationship becomes strained.