The Lady of Shalott is imprisoned on a tower on an Island. She is cursed and cannot look through her window, so she looks through a mirror to see what is outside.
What ever the Lady of Shalott sees out of her mirror she weaves into a tapestry. No one can ever hear the Lady but the Reapers can hear her singing 'Her last song'. Through her mirror she sees Sir Lancelot riding down to Camelot in bright and shining armor.
The mirror cracked and the web flew out of the window. So she made her way out of her tower that she is imprisoned on, she made her way down to the boat with her name on the bows.