Kevin is still recovering from a surgery and having some delusional dreams that can affect his relationship with Tommy. Justin finally decides to leave the nest and Nora meets a man from the past. Kitty steps in for Kevin as Robert's communications chief and prepares for interviews about her upcoming book at the same time.
Sarah, Kyle and Ethan are preparing for an upcoming tech conference and it comes up that they will need a lot of money so that their website could be ready in time. Kitty is having a book signing but Robert and the Walkers have other plans. Tommy uses Rebecca to get Ojai back.
The entire Walker family, except Nora, are literally swept off their feet by the charms and tango lessons of Sarah's new lover, Luc Laurent. But Nora quickly finds that her new French houseguest is a great comfort during a very difficult time. Meanwhile, Robert puts forth his most romantic efforts to distract Kitty from cancer, and Kevin and Scotty stumble on an unexpected surrogacy candidate.
In the throes of chemo, Kitty is thrilled when a surprise visitor comes to town, while Sarah finally realizes that she has to tell her kids about Luc. Meanwhile, with Ryan and Rebecca's help, Holly finds a way to keep her financial future from unraveling, and Kevin and Scotty finally agree on a possible surrogate.
Kitty is devastated when she is faced with the visible ramifications of her cancer treatment, Nora makes a surprising friend with benefits, and Scotty takes stock when his father delivers some shocking news about his marriage.
When Ojai's newest wine is submitted at a local festival, the family hold their breath as they wait to see if the company can be saved. Meanwhile, Justin and Rebecca harbor life-changing secrets from one another, Nora has a secret crush on a younger man, while Sarah and Luc discover that they may not be as compatible as they had hoped.
As the wedding grows closer, Justin's resolve to stay sober is weakened as he and Rebecca harbor secrets that could make or break their relationship for good. Holly's financial crisis grows much more dire, and Sarah is consumed with worry and jealousy over Nora's newfound romance as she struggles to get over her own heartbreak from her love affair with Luc.