Martha Grey, formerly companion and nurse to the late Marcia Gilbert, heads home, detouring, as a final duty to Marcia, to deliver bequests to her niece, Frances Gilbert. On the journey Martha is unwell and on arrival, faints. Frances mistakes Martha for Marcia and pleads with 'her Aunt' for her help. What should Martha do? Will she be able to help? And what will be the outcome of Changing Places?