Ned Stark, Lord of Winterfell, becomes the Hand of the King after the former Hand, Jon Arryn, has passed away. But before Ned goes to the capital, King's Landing, a letter arrives from his wife's sister Lysa, who was the wife of Jon Arryn. There it says that her husband was murdered, and it is up to Ned to find out what's going on. But that isn't everything. The White Walkers have been seen, and they seem to go down south.