Part1- Chap 1: In futuristic London, fifteen-year-old Alex narrates in "nadsat" slang from the Korova Milkbar, where he drinks drug-laced milk with his three friends, Pete, Georgie, and Dim. Three girls down the bar catch Alex's attention, as does a drugged-out man near him. An old popular song on the stereo gains Alex's disfavor, and he hits the drugged-man before they leave the bar.
The boys see an elderly professorial man outside, a rarity since the police shortage and preponderance of gangs has made the streets unsafe. They feign disgust at the supposedly lewd material contained in the man's inoffensive science books, rip up the books, strip him and beat him up before letting him go. The booty from his plundered pants - love letters and a little bit of money - is inconsequential, and they move on.
They decide to do something generous with their money so they have an incentive for more shop-lifting and so they have an alibi for future need. At a bar they spend all their money on drinks and food for some poor old women. They go to a candy and cigarettes store and, with masks of popular figures on, rob and beat up the owner and his wife. They check back in with the old women and make them confirm their alibi. Two cops come in later and the women vouch for the boys.

Part1- Chap 2: Alex and his friends leave the bar and beat up an old, dirty man who sings old songs. They pause to let him condemn a world that allows young men to do harm lawlessly, and tells them to kill him, as he'll be better off that way. They beat him until he bleeds badly. They come across a rival gang, led by Billyboy, in the middle of raping a young girl. They fight with chains and razors, and despite being outnumbered six to four, Alex's gang prevails with Dim's strength. The cops come, probably alerted by the raped girl, and both gangs scurry away. Alex and his friends hide in an alley lit up by the glow of televisions in apartments. Dim wonders about life on the moon and stars.
They steal a car and joyride into the country, terrorizing pedestrians along the way. They drive up to a cottage labeled "HOME" and Alex convinces the woman inside that he needs to call an ambulance for his sick friend. When she opens the door, he and his masked friends run inside. The attractive woman's writer husband is also inside, and Alex inspects his manuscript titled "A Clockwork Orange." Alex rips up the manuscript while the others beat up the man and eat the food in the house. The boys take turns raping the woman while making the man watch. They smash up the objects in the house and leave the occupants moaning on the ground.

Part 1- Chap 3: The boys' car runs out of gas and, feeling hateful, they push it into a nearby body of water. They take the train back to the center of town and cause some damage on the ride. They return to the Korova Milkbar, where the drugged man still babbles away. Teens pack the place. In a pause between songs, a woman sings a piece of an opera Alex knows, and it affects him deeply. Dim mocks her and Alex hits him. Dim threatens to beat him up, and Georgie and Pete affirm Dim's right to be upset. They plan to meet up tomorrow. They go home separately.
Alex goes to his parents' flat in Municipal Flatblock 18A. He eats the dinner his mother has left out for him, then retires to his room. He blissfully listens to a violin concerto on his stereo, imagining himself raping young girls as he listens. He ejaculates at the piece's climax. After, he listens to Mozart and then his favorite, Bach. He thinks more about the people at the "HOME" cottage and wishes he had beaten them harder.

Part 1- Chap 4: Alex wakes up the next morning tired and not wanting to go to school. His parents go off to work, as is required by the government, and he dreams that Georgie and Dim are ordering him around in the army. He wakes up to answer the door for P.R. Deltoid, his "Post-Corrective Adviser." Deltoid warns him that his name is being connected to the fight