Life is wonderful on the planet Willi comes from. There’s no illness, everybody’s in a good mood and it’s cuddles all around. One day Willi ends up on Earth in the bosom of a great family that loves him very much. But life here is still difficult for him. He has no defences against our diseases and his heart wasn’t made for our hectic life. Willi gets very ill and almost climbs back into his spaceship to fly home. Almost.