The end of summer has arrived. David, a lonely-hearted elementary-school student, is
looking for a good friend. But when he stands up to his bully Gavin, David unknowingly
discovers a beautiful, magical girl, Marna, as she unfurls her beautiful butterfly wings.
Marna and David soar through the air as they go on adventures, and David
hopes Marna is here to stay. One day, however, Marna is discovered after she grows ill,
and the doctors will not let her go. David must help save Marna and set her free,
seeking help in the most unlikely source. In the end, will Marna stay, and David be able
to let her go?