Agatha Verrall, the main character in May Sinclair's novella The Flaw in the Crystal, discovers that she has a psychic gift: she can improve the mental states of both herself and other people by tapping into an internal power source.
As often happens, this activity starts well but ends badly. As we have seen from what happens to Austin Gilroy in Arthur Conan Doyle's The Parasite, even actions taken with good intentions sometimes backfire on the originator.
Rodney's Lanyon's recovery
The first recipient of Agatha's healing attempts is her friend Rodney Lanyon. He is in a terrible state because of the effect his disturbed wife Bella has on him. Not only does he improve out of all recognition after Agatha's secret interventions, Bella incidentally becomes much better too.
Agatha is delighted to hear from Rodney about this unexpected development:
“It was another instance of the astounding and mysterious way it worked. She must have got at Bella somehow in getting at him. She saw now no end to the possibilities of the thing. There wasn't anything so wonderful in making him what, after all, he was; but if...Bella...had been, even for a week, a perfect angel, it had made her what she was not and never had been.“
The future may seem bright, but what looks like the start of something big at the time often turns out to have been as good as it gets. This was the high point in Agatha Verrall's career as a healer.
The arrival of some more friends
Agatha Verrall has come to live in a remote place, one that Rodney can easily get to, so that she can concentrate on using her gift to heal him to the exclusion of everything else.
Agatha has told two of her friends, the Powells, that she moved to the area for her health. What a tangled web we weave...