Ghosts on the Loose

The boys attend their friend's wedding. They mistakenly renovate the wrong house. It's next door which is supposedly haunted. They find a Nazi printing press.

The two houses confused me as much as it confused the boys. The story should be simpler. Quite frankly, the boys try to hide the Nazi stuff when they thought it was their friend. I don't know if that's a good message during the war years. I understand the back and forth is supposed to be funny but there is something fundamentally unfunny about this one.