How to summarize the story of Jon Irene's death in Game of Thrones?

I have answered this question before, and I will copy the answer for your reference.

As a native of the mainland, the son of the forest believed in old gods, but was attacked by his ancestors and failed. The ancestors who believed in the seven gods drove the son of the forest to the north of the desperate Great Wall, and the son of the new forest created a strange ghost and lost control of it.

Later, immigrants from another continent defeated their ancestors, and through war, the dragon gained the right to rule. Later, in the era of the mad king, the fat man joined others to attack the dragon (because the fat man liked Ed's sister, but Ed's sister married the prince of the mad king). After the fat army invaded the city, the mad king planned to kill everyone with green fire and ordered Jamie to set fire, but Jamie's old bean was with the fat man, so Jamie killed the mad king, so he was called the kingslayer.

Lujia ascended the throne. The iron islands were beaten because they didn't cooperate with the fat king. After the defeat, Shane was sent to the wolf's house as a proton. After that, the fat king's private life was decadent and there were many illegitimate children. However, Jon Irene discovered through observation that the illegitimate children of Fat King are all black hair, while Joffrey is really blonde, so she looked around for evidence of Cleopatra's adultery with Jamie. Littlefinger found this sign, so she encouraged Ed's wife's sister to poison Irene.

Then there is the first season and the first episode of the play. Because the Prime Minister died, Fat King went to Wolf Castle to find Lao Wolf as Prime Minister.