Mark Ridden is a drug addict, and the three people who live with him are of the same kind, Simon the "Sick Child", and Daniel the Mentally Handicapped "Potato" Daniel; the girl named Allison, her little daughter Dorn is her and these three. One of the people was born, but none of them can figure out who the father of this child is. Friends who frequent them are Tommy and Bergby; another lively, healthy and drug-free Tommy, he is in love with Liz, and the violent Bergby.
Mark and Daniel cleverly eliminated themselves from the interview, thus avoiding the suspension of unemployment benefits. Afterwards, they went to the bar to celebrate. Bergby brutally injured people at random, and the bar fell into chaos. Mark met the young and sexy Diane at the disco, and she took Mark home for the night. Unexpectedly, Di An was only 14 years old. Liz suspects that Tommy sold the video of the two having sex to someone else and decides to break up with Tommy, but Mark actually stole it.
Mark tried to quit drugs, but in the end he couldn't resist the temptation and his vices remained. He and Daniel rob tourists and use the money to buy drugs. Tommy was devastated because of the departure of his girlfriend Liz, and he also indulged in drugs, ruined both physically and mentally. Alison's little daughter suddenly died on the bed. Mark and Daniel were caught stealing from the supermarket. In order to forget this series of troubles, Mark took an overdose of heroine and became unconscious and was sent to the hospital for rescue. His parents took Mark home and locked him in the room, forcing him to detoxify. At this time, he realized that stability is the essence of life. So after rehabilitating drugs, Mark left Edinburgh to find a job in a real estate company in London.
Unexpectedly, Mark's new life was interrupted at the beginning, and Bergby and Simon followed one after another. Mark couldn't bear them anymore. Then came the bad news that Tommy had died of AIDS, and they returned to Edinburgh to attend the funeral together. Bergby obtained 4,000 pounds worth of heroin from the Russian seamen, and then went to London to resell it with Mark and others (including Daniel, who had been released from prison), and sold it at a price of 16,000 pounds, making a fortune. That night, Mark took advantage of everyone's sound asleep and took all the money, ready to go abroad to start his new life, but he left Daniel's share in his suitcase.
