The Wall is a huge structure of ice, stone and magic on the northern border of the Seven Kingdoms. It is home to the Night's Watch, a brotherhood sworn to protect the realms of men from the threats beyond the Wall.
However, Daenerys' growing love for Drogo and newfound mental strength as the Khaleesi of the tribe mean Viserys' plans go unexpectedly and powerfully awry.
Across the Narrow Sea in the continent of Essos, the exiled, arrogant Viserys Targaryen , son of the former king whose throne was usurped, believes he still has the rightful claim to the throne. He marries off his younger sister, Daenerys Targaryen , in an exchange for an army to return to Westeros and take the throne.
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George R. R. Martin set the Ice and Fire story in an alternative world of Earth or a “secondary world”, such as J. R. R. Tolkien pioneered with Middle-earth .
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Most of the story takes place on the continent Westeros, which consists of the Seven Kingdoms (the North, the Iron Islands, Mountain and Vale, the Rock, the Storm Kings, the Reach, Dorne) and an unmapped area to the north, separated by a massive wall of ice and old magic.
And beyond the wall, Ned's bastard son Jon Snow joins the Night's Watch, an ancient brotherhood sworn to watch over the massive Wall that separates the Seven Kingdoms from the dangerous unknown beyond. But an ancient force, long believed dead, threatens the land.
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Game of thrones is a TV series，It is based on a novel A song of ice and fire.

The story takes place in a land of overhead: the seven kingdoms of westeros. Westeros is about the size of South America continent, has long history can be traced back to 12000 years ago. Every season there usually lasted for years.