plz give the brief summary of the chapter 'A shady plot '

 John Hallock, a successful writer of short stories, is asked by his publisher, Jenkins, to write a new story. As Hallock sits waiting for inspiration the ghost of a woman appears and tells him that she has been inspiring him so far but is now goin on strike as she is sick of people with Ouija boards calling her all the time. As he tries to appease her, his wife Lavinia comes in to announce that she has bought an Ouija board and is inviting friends to call up spirits. He is aghast, when at the party he has to sit with a woman and the spirit who comes up is the same ghost ( of Helen ) who accuses him of being a traitor. This creates suspicion in his wife's mind about his faithfulnee to her and she threatens to leave him. Even the cook / maid, Gladolia wants to leave as she does not like Ouija boards and spirits. The ghost reappears and tells him that his wife must get rid of the Ouija board. As he is trying to argue with the ghost, his wife comes in and when told by the ghost that she is not the Helen of Troy, but another Helen, an ordinary woman of New York ( now dead ), Lavinia forgives her husband and promises to get rid of the Ouija board which makes everyone happy- the ghost of Helen, the maid, and, of course, the author. 

HOPE DIS HELPSS :) :)