After several dreamy days in Italy, where the two meet while on solo vacations, they return to their separate lives in Los Angeles. But Leo can't resist calling Isabel, even though she decides to accept a marriage proposal from her longtime boyfriend. The bond they formed overseas haunts her, too, and Leo is nothing if not persistent: ""When love does come around,"" he tells her, ""you can't take it lightly.""

Leo insists that Isabel tell Everett that the wedding is off. She does-but she can't refuse when he asks her to attend nuptials at which his family had expected to meet her. Meanwhile, Leo's sister Rhonda has a breakup of her own to deal with.

Everything seems perfect as Leo and Isabel prepare to consummate their relationship; everything, that is, except the timing. The one-year anniversary of the death of Leo's mother is approaching and the emotional strain is taking its toil on the young lovers' blossoming relationship-not to mention the rest of the Roth family.

Isabel is jealous when Leo goes after an assistant's job with successful -- and beautiful -- architect Julia Cordoza, a client of Alan's who could propel Leo to the career he's always wanted. Meanwhile, Karen goes shopping for a new set of wheels and ends up in a weird flirtation with car salesman Doug.

Jake refuses to explain why he's so desperate for $100 in cash but sees an opportunity to earn it by chauffeuring around Isabel's visiting young cousin, Anne. While driving Miss Annie, though, Jake begins falling for the quiet, contemplative girl.

Will Karen and Doug's cheatin' hearts tell on them, or will Leo. Meanwhile, Isabel ain't misbehavin' but feels guilty anyway when she runs into Everett while jogging; and Jennifer receives an ominous letter from one of her professors.

Leo faces some tough realities as he deals with his grandfather's recent heart attack and the departure of Isabel, who's found an apartment of her own.