In her recurring role as Myra Sherwood, Ann Baxter, with whom Dr. Welby is in love, takes a pregnant, unmarried ""flower child,"" Tracy Clifford, into her home. Dr. Welby, who is treating Tracy for mononucleosis, warns Myra against deep emotional involvement with the girl. Myra, however, whose own daughter would have been Tracy's age had she lived, makes plans to maintain Tracy has her own child--when it is born--indefinitely.