The exposition of The Knights Tale is on the battlefield and it introduces two characters that are cousins Palamon and Arcite who then get put into a tower.
The two cousins were trapped together every day. They saw the same girl everyday. They both fell in love with her. They began fighting.
They kept fighting over Emily. The goaler came unto them and said the Arcite must leave the tower by sunset tomorrow, but he must never come back. He technically ignored the rule and he came back as a servant and saw Emily every day. His brother caught him.
The brother cousin caught Arcite. They were both jealous so they had to joust to see who would get to marry Emily. And arcite won, but he fell off of his horse and he died. So Palamon marries Emily.
Emily doesn't really like palamon. She thinks his hair is thin.