The Lady of Shalott is based on Tennyson's poem of the same title.
In the story, the Lady of Shalott weaves images of people passing her castle on the way to Camelot. Because she is under a curse, she may only look at the reflections of passers-by in her mirror, never directly at them. One day Sir Lancelot rides by and she is turns from her mirror to look at him directly:
Out flew the web and floated wide;
The mirror crack'd from side to side;
"The curse is come upon me," cried the Lady of Shalott
She rushes from the room and takes a boat downstream toward Camelot. She dies before she reaches there, and Lancelot's glance falls upon her: She has a lovely face
God in her mercy lend her grace,
The Lady of Shalott