The story is about a young boy named Leo who dreams of becoming an astronaut. He faces a challenge when his teacher tells him he's not good enough, but he decides to keep working hard with the help of his mentor, Mr. Jenkins. Leo comes up with a plan to build a rocket ship with Mr. Jenkins, and they finally launch it into space. During his journey, Leo faces a challenge when his rocket starts to malfunction but is rescued by NASA astronauts. He becomes a hero, inspiring others to pursue their dreams. The story ends with Leo looking forward to his future as an astronomer.