When the Ziffels go on a second honeymoon at Niagra Falls, they leave Arnold with Oliver and Lisa. While there, Arnold is drafted by the U.S. Army.

The Douglases are asked to donate old clothing to a charity rummage sale. Lisa is glad to give away Oliver's entire wardrobe, but can't part with any of her dresses. Each has a memory attached, leading to flashbacks of Oliver asking Lisa's father for her hand in marriage, the Douglases' honeymoon in Switzerland and their first party in their new Park Avenue apartment.