Young probationer nurse Frances Dorland is helped with the ups and downs of hospital life by "the Professor". But just who is this kind and understanding older man?

Frances's nursing friends joke about the identity of the Professor, but the truth is that none of them know anything about him, except that he proves to be a loyal and kind friend to Frances.

As Frances starts to realise she feels more than friendship for the Professor, she is also trying to help the course of true love run smoothly for her best friend Estelle Dexter. And handsome student doctor Bart More is sending mixed signals to both young women.

It is only when one of the hospital staff becomes dangerously ill that Frances and her friends come to realise home truths that will change their lives forever.