Six-year-old Eira lives happily with her adoptive mother, Mariel, in a small-town apothecary. When Eira discovers that she possesses rare life magic capable of reviving dead plants, she uses it to help save her critically ill friend, Caspian. But after a well-intentioned spell spirals out of control, her identity as a witch is exposed, turning the townspeople’s curiosity into fear. Royal judge Silas exploits their prejudice and frames Eira for the mysterious decline of the town’s ancient Guardian Tree, forcing Eira and Mariel into exile. When the tree begins to die for real and the entire town faces disaster, Eira chooses to return—not to prove herself, but to save the lives she still cares about. The truth reveals that witches were never the threat: their life magic was what kept the Guardian Tree alive. In the final crisis, Eira saves not only the tree, but also Mariel, finally finding a home that accepts her exactly as she is.
