Polynices, a niece of the King of Thebes, Creon, betrayed Thebes. As a result, after Polynices passed away, Creon gave a proclamation making an edict prohibiting anyone to bury Polynices, disrespecting him. The consequence of transgressing this will be death.
Antigone and her younger sister Ismene were talking about Creon's new decree. Antigone believed that even though Polynices was a trader, he deserved a proper burial since he was beloved and was a brother to Antigone. She was planning to bury him, breaking the "unjust" law. However, Ismene believed the opposite and told Antigone that she shouldn't to save her life from the severe punishment Creon will give. However they did not listen to each other like water and fire.
Antigone buried Polynices with bravery and had no doubts. When Creon found out that Antigone buried Polynices, Antigone had to see Creon. Antigone is a lion. The lion walked through Creon's yawning gate as everyone was looking at her. The lion's bravery was the bravery of a million people. Antigone wasn't a bit terrified. Creon stood up from his raging throne and sentenced Antigone's death. Antigone explained to Creon why he is wrong but Creon did not even care a bit.
Creon's son Haemon attempts to convince Creon not to kill Antigone because of his love for her. Creon stubbornly refuses and doesn't listen to Haemon due to his huge ego. Just like Antigone Haemon explains to Creon why he should listen to other ideas. He says that nothing can be a city if it is ruled by one man, showing how Creon doesn't take advice. however, Creon being perverse, said that the city can't tell him how to rule. Creon is acting like Thebes is only his hearth. Haemon tries to kill his father but killed himself instead.
As Antigone walks her last steps to death, she alludes to Niobe having the slightly the same fate. Antigone feels she will die in isolation, like Niobe, without anyone to reverence her. Teiresias, a blind prophet has an argument with Creon about the same problem. Creon is again to stubborn and doesn't listen to the prophet. The prophet saw the future and warned Creon about the ruin of Thebes. Creon is unaware about what Teiresias is saying due to his ego and he isn't making conscious decisions.
By the time Creon realizes his flaw, it was too late. Hubris brought him down. He didn't listen to anyone and didn't take the messenger seriously. There was nothing he could do to escape fate. His wife killed herself knowing her son died. He is alone as everyone died and Thebes turned against him.