When a young queen falls ill, her children are sent deep into the forest in search of her only cure: the legendary unicorn. The great magician Merlin helps them on their quest. With riddles and the unicorn's song, the children travel to the magical isle of Avalon. There, they must decide what can truly cure their mother -- King Arthur's powerful sister, Morgan-le-Fay, or the healing touch of the unicorn. Includes "Greensleeves", "Early One Morning", Gregorian chant, Celtic songs and wild medieval dances.