Kitty, Robert and Nora struggle to accept Kitty's cancer and to come to an agreement on the best possible treatment, but as they prepare to share the news with the entire family, a surprise visitor from afar makes the burden a bit easier to bear.

The Walker family, with the exception of Nora, are surprised by the charms and tango lessons of Luc Laurent, Sarah's new lover. However, Nora quickly uncovers that her French houseguest is a very good comfort during a very difficult time. Meanwhile, Robert needs to distract Kitty from the cancer, and he uses his most romantic efforts into the situation.