In 'Hey Arnold! The Movie,' Arnold and his friends discover that their beloved neighborhood is under threat of being demolished to make way for a new development. Determined to save their home, they embark on a mission to stop the demolition. Along the way, they encounter various challenges and obstacles, but their friendship and determination prevail as they work together to protect their neighborhood from destruction.

After finding a map left behind by his missing parents, Arnold and his friends embark on a thrilling journey in the jungle to find them.