In a lush forest of the Pacific Northwest, a boy named Pete has lived for six years alongside a dragon named Elliott, who is more than just a creature: he is Pete's best friend and protector. Ever since he lost his parents in a car accident, Pete found refuge in the magical company of Elliott, a green dragon with the ability to become invisible and a big heart. His life in the forest, away from civilization, unfolds in harmony until one day, a search by a local family reveals his existence.
Grace, a park ranger with a complicated past, stumbles upon Pete and discovers his incredible story. Intrigued by the boy's connection to the dragon, she tries to understand what is really happening in the forest. However, her father's curiosity, the dragon hunter, threatens to break the magical friendship between Pete and Elliott, leading to an exciting confrontation. As tensions rise, Pete fights to protect his friend and demonstrate that sometimes, the extraordinary can be real if one believes with all their heart. With a combination of adventure, humor, and touching emotions, the film reminds us of the importance of friendship and love, and how fantastic creatures can transform our lives forever.