what was the story of this episode?
The episode furthers the story line of deterioration of the political balance of the Seven Kingdoms, with Eddard Stark revealing what he has discovered to Cersei Lannister while King Robert is still away on a hunt.
You Win or You Die
The episode furthers the story line of deterioration of the political balance of the Seven Kingdoms, with Eddard Stark revealing what he has discovered to Cersei Lannister while King Robert is still away on a hunt. 
who says when you play the game of thrones you win or you die UNANSWERABLE is 'you win or you die' a television series? Yes, it is the  seventh episode of the first season of television series "Game of Thrones".
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You Win or You Die [SEP] Introduction
The title of the episode is part of a quote from Cersei Lannister during the final confrontation with Eddard: "When you play the game of thrones, you win or you die. There is no middle ground." The catchphrase has been frequently used during the promotion of both the books and the television series. The episode was generally well received by critics for its well-acted dramatic tension, but with several criticizing the coupling of exposition and nudity as "sexposition". In the United States, the episode achieved a viewership of 2.4 million in its initial broadcast.