From a riddle-speaking butterfly, a unicorn learns that she's supposedly the last of her kind, the RedBull having herded away most of the others. The Uni-Corn sets out to find the truth behind the butterfly's words. She is finally linked on her quest a second rate magician by Schmendrick, and Molly Grue, a woman who dreamed all her life seeing a unicorn. Their journey leads them into King Haggard's castle far from your home.