 Once upon a time there lived a very sad man up in the silvery moon. Since countless years he stares down to planet earth and thinks of his greatest wish: being like us humans - just once in his life. But the Moonman can t leave his home, condemned to infinite loneliness. One night he gets a suprising chance. He manages to jump on a passing comet that brings him to the place of his dreams: earth. But the blue planet isn t as peaceful as he imagined it. Above all, a fierce general considers him an intruder and strives to capture the poor fellow. Only 8-year-old inventor Lucia finds out about the true nature of the harmless alien. She rescues him from the General s dungeon and guides him to the castle of her famous grandfather Bunsen Van der Dunkel. But even here he is not safe from mankind. With a heavy heart Lucia decides to send her embosomed friend back to where he came from: the moon. And very soon the General s men find out about the hidden visitor. As the General tries to conquer grandpa s castle with a giant airship, Lucia has to use her wit and imagination to come up with a new rescue plan. In the highest of all towers rests a rusty space rocket, ready for lift-off. But how will the Moonman s chubby head fit inside the tiny lid? An entertaining shortfilm for children & adults, based on the book by Tomi Ungerer.