At the reading of Big Guy Beck's "video-will," the Beck clan learn that they must cohabitate with Big Guy's illigitimate son, Wild Bill Westchester, and his wife, Bootsie, in the family mansion in order to stake claim on their inheritance.
The Becks attempt to disprove Wild Bill's relation to the family by drugging him and siphoning his blood.
Marshall and Carlotta try to keep up appearances when a Town and Garden magazine considers featuring the family mansion... but Mother B. and the Westchesters inadvertently muck up their plans.
Kathleen tries to lure Wild Bill into her boudoir in an attempt to break up the Westchester marriage and nullify their inheritance.
During his birthday celebration, Marshall is kidnapped by two ladies clad in a cake.
Marshall tries to impress Carlotta by taking out a massive loan, but he's too naive to realize that he got the cash from a loan shark.
When Carlotta discovers that Bootsie has an interest in the occult, she sets up a phony seance as an attempt to get the Westchesters to forfeit their inheritance.
The family competes to receive a $10,000 bonus on their inheritance by getting jobs.
Marshall and Carlotta's meeting with an elite club goes sour, thanks to their family's intrusions.
Marshall, Carlotta and Kathleen are horrified when they learn that the Westchesters want to join their country club.
Bootsie admits that she never completed high school when Carlotta is put in charge of a high-school equivalency test drive.
A Civil War diary is found documenting treasure in Toad Hall, the family mansion.
In order to gain tax exemption when they learn that Toad Hall is a historical site, the family opens up the mansion for tours.
The race is on when it's revealed that there's a large inheritance waiting for the family member who bears the first Beck grandchild.
Kathleen's wedding to Hugh McPheeters, another rich old-timer, goes awry when Hugh finds himself attracted to Mother B.