As Mike begins to notice the abuse his younger brother Bobby is suffering at the hands of their stepfather, he becomes determined to find a way to protect him. With the help of their friends, Mike and Bobby work together to transform their beloved toy trolley, the Radio Flyer, into a makeshift plane.
Despite their efforts to escape, their stepfather's abuse only grows more violent, leading to a heartbreaking climax where the two brothers make a daring escape attempt in their makeshift plane. As they soar through the air, Bobby ultimately sacrifices himself to ensure Mike's safety, leaving a lasting impact on his brother as he recounts the story of their adventure.
The film explores themes of childhood innocence, sibling bonds, and the power of imagination in the face of adversity. It serves as a poignant reminder of the lengths people will go to protect those they love, even in the most challenging circumstances.