La Belle Dame Sans Merci summary

The speaker of the poem comes across a "knight at arms" alone, and apparently dying, in a field somewhere. He asks him what's going on, and the knight's answer takes up the rest of the poem. The knight says that he met a beautiful fairy lady in the fields. He started hanging out with her, making flower garlands for her, letting her ride on his horse, and generally flirting like knights do. Finally, she invited him back to her fairy cave. Sweet, thought the knight. But after…