As Halloween nears, Uncle Bill and Mr. French plan a special trick-or-treat expedition when they realize that Halloween in New York City doesn't compare to the small-town holiday Buffy and Jody are used to. Meanwhile, Sutton tries to coerce Sissy into playing a Halloween prank on the building's superintendent.
Uncle Bill decides that Buffy and Jody should be home-schooled by Mr. French when they don't quite fit in at the elite private school where he's enrolled them. Meanwhile, Sissy is surprised when the savvy and intimidating girl from her performing arts high school is also her neighbor in the apartment building.
Bill Davis and his proper English butler, Mr. French, enjoy a carefree life in a posh Manhattan bachelor pad until Bill becomes the reluctant guardian of his brother's orphaned children. 6-year-old twins Buffy and Jody arrive at the apartment – and waste no time getting into trouble. To the dismay of shell-shocked Uncle Bill and French, teenager Sissy soon follows.