Viv's cousin, Harold, a symphony percussionist, has been hired to play for a New York orchestra. In an attempt to relax the high-strung man, Lucy hypnotizes him into a deep sleep. Come showtime, however, they can't wake him up.
Chris decides to go steady with a boy who turns out to be Mr. Mooney's son. Lucy and Mr. Mooney don't like it and team up to show the kids a lesson by teaching them the real responsibilities of a serious relationship. And then the two adults must camp out in a treehouse to make sure the two don't elope.