What is the main conflict in The Overcoat by Nikolai Gogol?

The story begins by taking its readers through the mundane and alienating world of a bureaucratic office in St. Petersburg where an awkward, impoverished clerk must scrimp and save in order to afford a badly needed new winter coat. As the story progresses, we enter a fairy-tale world of supernatural revenge, where the clerk's corpse is seen wandering city streets ripping coats off the backs of passersby. Gogol's story is both comic and horrific— at once a scathing social satire, moralistic fable, and psychological study.