To win the heart of his beloved (Michelle Pfeiffer), a young man named Tristan (Charlie Cox) ventures into the realm of fairies to retrieve a fallen star. What Tristan finds, however, is not a chunk of space rock, but a woman (Claire Danes) named Yvaine. Yvaine is in great danger, for the king's sons need her powers to secure the throne, and an evil witch[C4]wants to use her to achieve eternal youth and beauty.