What is the main conflict in Dagon and Other Macabre Tales by H. P. Lovecraft?

Herbert West is a doctor, trained at Miskatonic University, who developed a serum that he believes will reanimate corpses. While at college, he experiments on several cadavers, and although he has some preliminary positive results, he ultimately fails at reanimating a corpse. He is convinced that the failure of his experiments is due to the fact that his corpses are not fresh enough, so he spends some time acquiring fresher corpses first by hiring grave robbers and eventually by killing a man himself so that he can try to immediately reanimate him. As he begins to see more and more success, his obsession with reanimation grows. He eventually succeeds in reanimating his previous rival and dean of the medical school, Halsey. Halsey turns into a murdering cannibal, but this only redoubles West's desire to reanimate more effectively.