The ‘darkling plain’ is the vast Saskatchewan prairie in the early years of the century and the main character Vickers is a young man who has returned from WWI suffering a deep malaise of the soul along with weakened lungs from gas poisoning. He has decided to leave the main post of civilization, family, and friends and self-exile himself out on the sparsely inhabited prairie to get free of the “fever and sickness of humanity”. What exactly he suffered in the war and what he needs to escape is never actually clear. There was a lot of vagueness in this area.
The writing is decent because Stegner just has a way with words but the idea behind the story was somehow missing clarity and meaningful details. I kept wanting more than I was getting. After finishing the book, I once again checked my “Conversations on History and Literature” (Stegner and Etulain, 1983) and found Stegner saying that there was “plenty of trouble” with that book. He says, “It’s an imagined novel, and war heroes I knew not one damn thing about. I knew nothing about war. So, the experiences of this character Vickers are purely hypothetical, disastrously so, I would say.” Okay then...so that is why there seemed to be a vacancy in the writing....he didn't have any experience with what he was writing about.
The story ends with the horrendous influenza pandemic in 1918 that Stegner actually had experience with and lived through. This virus crawled its way around the world and was estimated to have killed 30 to 50 million people worldwide, with a lesser number of 675,000 in the US. By the conclusion, our hero seems to have made the decision to rejoin civilization and join in the struggle of the common man. So hurray for that.