Lucy is bent on impressing Ricky's family when they leave Florida and visit Havana, Cuba, but she cannot seem to say or do anything right.

Lucy, Ricky, Fred and Ethel reminisce (via flashbacks of previous episodes) as they trim the tree on Christmas Eve. The flashbacks were all from season 2, include Lucy telling Ricky about her pregnancy in Lucy Is Enceinte, Lucy, Ricky, Fred and Ethel singing in a barbershop quartet in Lucy's Showbiz Swan Song, and Ricky, Fred and Ethel franctically preparing for Lucy's impending labor in Lucy Goes to the Hospital.