In a magical backyard, young Luna discovers that Professor Oakwood, a wise old tree, possesses the power to heal. When her suspicious neighbor, Mr. Grimstone, threatens to uncover the tree's secret, Luna and Professor Oakwood devise clever tricks to protect it. Together, they create a magical barrier to keep Mr. Grimstone away, ensuring that the tree's magic remains safe. Luna learns the importance of friendship and courage in safeguarding the wonders of her world.