After Andy announces that he's invited a couple of friends over, the Keatons are surprised when two people in their seventies walk in. Andy introduces Joseph Simmons and Eva Martin to the family, explaining that they are from the retirement center which Andy's class visits each week as a school project.
As Steven listens to Joseph and Eva talk about their lives and friendship with Andy, he gets an idea. Having been searching for a subject for his new documentary, Steven sees a story about Andy, Joseph and Eva as the perfect solution. A few days later, Steven and his cameraman visit the center and videotape Andy asking Joseph and Eva how they met, at which point Joseph suddenly pops the question to Eva, who agrees to marry him.
Problems develop, however, when Joseph's son David strongly objects to the marriage and Steven is asked to try and reason with him. After an emotional scene that doesn't seem to change David's position, Steven invites the dejected couple to be married in the Keaton home. As Steven gets the wedding action on video (and annoys his children in the process), something else begins to happen which draws Joseph's old and new families and the Keatons closer together than ever.