Nimue is a Druid from a hidden oasis in the middle of the badlands. When a druid reaches the age of 21, they must pass a trial (The Rite Of Worth) that determines whether they can leave the oasis, or be bound to it forever. Nimue's sister Nautica passes the trial, while Nimue does not. One night, she manages to find an exit, but she cannot return to her home. With the help of her new friends, Vettais and Vivi, she is determined to find a way home, find her sister, and uncover the dark conspiracies of the rulers of the land.
Nim is a white mage, specializing in healing and nature magic. She and her sister are born from a flowering tree in the oasis and live together, until they are separated by the Rite Of Worth.