Part 1
He falls into an introduction, three main sections and a conclusion. The short introduction propounds a number of riddles whose meanings will be further developed. Chapters two, three and four deal with suffering and the enjoyment of suffering; chapters five and six with intellectual and moral vacillation and with conscious "inertia"-inaction; chapters seven through nine with theories of reason and logic; the last two chapters are a summary and a transition into Part 2.
War is described as people's rebellion against the assumption that everything needs to happen for a purpose, because humans do things without purpose, and this is what determines human history.
Secondly, the narrator's desire for pain and paranoia is exemplified by his liver pain and toothache. This parallels Raskolnikov's behavior in Dostoevsky's later novel, Crime and Punishment. He says that, due to the cruelty of society, human beings only moan about pain in order to spread their suffering to others. He builds up his own paranoia to the point he is incapable of looking his co-workers in the eye.
The main issue for the Underground Man is that he has reached a point of ennui and inactivity. Unlike most people, who typically act out of revenge because they believe justice is the end, he is conscious of this problem. Though he feels the desire for revenge, he does not find it virtuous; this incongruity leads to spite and spite towards the act itself with its concomitant circumstances. He feels that others like him exist, yet he continuously concentrates on his spitefulness instead of on action that avoids the problems he is so concerned with. He even admits at one point that he’d rather be inactive out of laziness.
The first part also gives a harsh criticism of determinism and intellectual attempts at dictating human action, which the Underground Man mentions in terms of a simple math problem two times two makes four (see also necessitarianism). He states that despite humanity’s attempt to create the "Crystal Palace," a reference to a famous symbol of utopianism in Nikolai Chernyshevsky’s What Is to Be Done?, one cannot avoid the simple fact that anyone at any time can decide to act against what is considered good, and some will do so simply to validate their existence and to protest that they exist as individuals. This type of rebellion is critical to later works of Dostoevsky as this type of rebellion is used by adolescents to validate their own existence, uniqueness and independence (see Dostoevsky's The Adolescent) in the face of the disorder one inherits under the understanding of tradition and society.
In other works, Dostoevsky constructs a negative argument to validate free will against determinism in the character XXXXXXX. Notes from Underground is the marked starting point of Dostoevsky's moving from his psychological and sociological themed novels to novels based on existential and human experience in crisis.
Part 2
The second part is the actual story proper and consists of three main segments that lead to a furthering of the Underground Man's super-consciousness.
The first is his obsession with an officer who physically moves him out of the way without a word or warning. He sees the officer on the street and thinks of ways to take revenge, eventually deciding to bump into him, which he does, finding to his surprise that the officer does not seem to even notice it happened.
The second segment is a dinner party with some old school friends to wish Zverkov, one of their number, goodbye as he is being transfered out of the city. The underground man hated them when he was younger, but after a random visit to Simonov’s, he decides to meet them at the appointed location. They fail to tell him that the time has been changed to six instead of five, so he arrives early. He gets into an argument with the four after a short time, declaring to all his hatred of society and using them as the symbol of it. At the end, they go off without him to a secret brothel, and, in his rage, the underground man follows them there to confront Zverkov once and for all, regardless if he is beaten or not. He arrives to find Zverkov and company have left, but, it is there that he meets Liza, a young prostitute.
After they finish their "business" and, then, sitting in silence for a while, the underground man confronts Liza with an image of her future, by which she is unmoved at first, but, she eventually realizes the plight of her position and how she will slowly become useless and will descend more and more, until she is no longer wanted by anyone. The thought of dying such a terribly disgraceful death brings her to realize her position, and she then finds herself enthralled by the underground man’s seemingly poignant grasp of society’s ills. He gives her his address and leaves. After this, he is overcome by the fear of her actually arriving at his dilapidated apartment, and, in the middle of an argument with his servant, she arrives. He then curses her and takes back everything he said to her, saying he was, in fact, laughing at her and reiterates the truth of her miserable position. Near the end of his painful rage he wells up in tears after saying that he was only seeking to have power over her and a desire to humiliate her. He begins to criticize himself and states that he is in fact horrified by his own poverty and embarrassed by his situation. Liza realizes how pitiful he is and they embrace. The underground man cries out “They – they won’t let me – I – I can’t be good!” After all this, he still acts terribly towards her, and, before she leaves, he stuffs a five ruble note into her hand, which she throws onto the table. He tries to catch her as she goes out onto the street but cannot find her and never hears from her again. He recalls this moment as making him unhappy whenever he thinks of it, yet again proving the fact from the first section that his spite for society and his inability to act like it makes him unable to act better than it.