While playing the main quest in Mount and Blade II: Bannerlord, you receive a quest where the person who gave you the dragon banner will attempt to knock you down. You have the option to stop the conspiracy when it happens. However, there are a few issues with this. Because Bannerlord is in Early Access, that's to be expected, and at the moment, there isn't much to do.
When you receive notification from someone trying to plot against you, you can open your Quest Log to see "The Plan of Istiana" or "The Conspiracy of Arzagos", depending on who you are dating. are tidied up during the Dragon Banner quest. Usually, this notification appears after receiving the quest “Unify the Empire”. Whichever one appears, you'll see a progress bar, and it's usually in the middle of 1 of 000.
The quest prompt that everyone struggles with is Stopping the Conspiracy. As of this writing, it's impossible to do, and you won't be able to do it at all. Instead, you have to watch the progress bar in the Conspiracy Quest increase steadily until a faction declares war on you. You have to fight them and try to win peace with them. There is no peace option in the Kingdom menu, so the best way to go is to fight them until you capture enough of their leaders and territories until you can meet the leader. of the faction on the map and negotiate peace.
Unfortunately, there are a handful of bugs that you may encounter during the process of completing this quest. The best way to make sure you keep the Quest and don't lose it is to save often. You want to spare yourself your few days of play to provide a bug that breaks quests doesn't mean you failed it, for reasons unknown.
We will update this guide regularly as the developers at TaleWorlds Entertainment try to find a way to put this quest together. This is probably one of the last main quests available in the game until they keep releasing new content for Bannerlord.