Heart, a foundling who was discovered five years earlier wrapped in a unicorn-embroidered blanket, finds a pregnant white mare in the woods and struggles to keep her and her colt safe and well.

Lauren's friend doesn't want her father to remarry. On the day of the wedding, she is so unhappy that she runs away from home. Lauren and Twilight could help Jessica with a little magic, but if they do, will Twilights secret be safe?

To protect her gypsy friends, Heart and her unicorns leave them to continue their search for the place shown in Lord Dunraven's book whose symbols match those on Heart's foundling blanket.

While continuing the quest for her true identity, Heart and the unicorns once again join forces with the gypsies and Heart is taught to read so that she may one day unravel the secrets of Lord Dunraven's book.

Heart is convinced that the old man from Castle Avamir can help her find her family, but the old man has been taken prisoner by Lord Dunraven.

Lauren has a secret: when she whispers the magic words, her pony, Twilight, turns into a beautiful snow-white unicorn. Lauren is sure that the little pony Moonshine is really a unicorn. But Moonshine has to find a special friend to make the magic work. Lauren wishes she and Twilight could help -- but what can they do?

"Lauren's pony, Twilight, turns into a beautiful unicorn when she says the magic words. Lauren and Twilight have been busy using their special magic to help all their friends, but suddenly Twilight gets sick. Lauren is desperately worried--especially when the vet can find nothing wrong. What can she do to make him well again?"--P [4] of cover.