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.

Kitty is devastated when she must face the after effects of her cancer treatment. Meanwhile, Nora makes an unexpected friend; and Scotty's father shares some shocking news about his marriage.