Following clues given to them by a cat, Molly, Schmendrick, and Amalthea find the entrance to the Red Bull's lair. Haggard and his men-at-arms attempt to stop them, but they manage to enter the bull's lair and are joined by Lír. When the Red Bull attacks them, Schmendrick changes Amalthea back to her original form. At this moment, Schmendrick joyfully becomes mortal. In an effort to save the Unicorn, Lír jumps into the bull's path and is trampled. Fueled by anger and sorrow, the Unicorn drives the bull into the sea. The other unicorns are freed, and they run back to their homes, with Haggard's castle falling in their wake. As the castle falls, its wreckage dissolves into mist before it even hits the ground, and nothing remains to indicate that a castle had ever been there.