What is the main conflict in The Second Coming by Walker Percy?

Will Barrett is depressed and contemplates suicide. He is convinced that life is meaningless and absurd, even as others routinely ask him for philanthropic donations from his vast personal estate. Although his golf game is excellent, he suffers from epilepsy and often has strange fugues and irrational ideas. Meanwhile, Allison Huger escapes from an asylum and makes her way to Will's area where she takes possession of a newly inherited greenhouse and large estate. As Allison tries to recover her memories and build a life, Will decides to commit suicide in a novel way - he will demand that God manifest His existence to save his life. A toothache interrupts Will's quest and, in failing health, he staggers into Allison's greenhouse. Over the next several weeks Allison takes care of Will while he falls in love with her. The two characters then decide to overcome their deficiencies by focusing on external events. As Will abandons his notion of suicide, Allison looks forward to a future full of love and commitment.