The St. Gregory Hotel prepares for the elaborate wedding of Maggie Blackwood (MARY CROSBY), daughter of an aristocratic San Francisco family, and Jeff Strider (BOYD GAINES), adopted son of Gil Strider (STEVE FORREST), a computer manufacturer. However, prenuptial jitters set in and Jeff tries to deal with the anger he feels toward the mother he never knew who gave him up for adoption. On the eve of the wedding, Maggie's father, Lewis Blackwood (ROBERT STACK), is caught by his wife Eleanor (DINA MERRILL) with a Blackwood Company Executive, Paula (PATRICIA McCORMACK). Meanwhile, the groom's father is facing financial ruin as a result of his business partner's illegal stock manipulations. When Gil asks Mrs. Cabot for a temporary secretary, she arranges for the services of Teresa Clayborne (VERA MILES), whose expensive clothes seem out of range for a secretary. When the wedding rehearsal falls apart from all sides, Teresa intervenes to bring Maggie and Jeff back together and save the weddin