Joining the Stormcloaks

Information
This quest belongs to Stormcloak questline.

Quick walkthrough

 * 1) Go to Windhelm and talk to Ulfric Stormcloak


 * 1) Speak with Galmar Stone-Fist
 * 2) Travel to The Serpent Stone
 * 3) Kill the Ice Wraith
 * 4) Report back to Galmar Stone-Fist

Detailed Walkthrough
Palace of the Kings is located in Windhelm, when you enter just walk across the great hall and speak to the Jarl Ulfric Stormcloak. He will direct you to speak to his lieutenant, whom he was previously having a discussion about the war with, so he will be nearby. Once you speak to him he will send you to The Serpent Stone.

Once you reach the Serpentstone Isle you will face an Ice Wraith. When you have defeated the Ice Wraith just fast travel back to Windhelm

Inside the Palace of the Kings speak to Galmar Stone-Fist and accept to take the oath

Now you officially are a Stormcloak and will be referred to as Unblooded.