You will be able to start this quest by using the alliance map and selecting East Anglia after completing the "Uninvited Guests" quest.
The King of East Anglia is dead, long live the king! Help Finnr, a washed-up Dane steward in Northwic, groom Oswald for East Anglia's throne.
Travel to Northwic and enter the longhouse. You will meet Finnr there. He will tell you about the problems he has with setting up a new king and about the candidate he managed to find. You will decide to talk to this candidate.
Go to the place marked on the map on the other side of the river and find Oswald. You will notice that Oswald is not respected by the locals. He will tell you about the problems with the Rued clan, the same one that invaded your settlement.
Follow Oswald to a nearby farm - Beteleah Farm.
Kill all Rued's clansmen who are on the farm.
Go back to Oswald and talk to him. He will invite you to dinner which will take place after dusk in Elmenham.
Go to Elmenham, wait until dusk and enter the local longhouse. The feast will begin, during which you will have an argument with two guests - Broder and Brothir. The fight will begin.
You will fistfight with two opponents at once.
Once you defeat them, they will leave and Oswald will ask you to help him right this situation and take the throne and promise an alliance when he succeeds.
