The nine sisters of light want to make the world a more beautiful and cheerful place and sing their song as they work. This enrages the Son of Darkness. He darkens the sun so that eternal night may reign, but the sisters want to free the sun.

The devil begrudges Kasper his beautiful house. He wants to capture him and force him to build a new devil's house. But Kasper is clever enough to let the devil do all the work himself. The Kasper family succeeds in freeing Kasper and shooting the devil into the clouds.