A human girl visits the Rainbow Realm, an enchanted land ruled by a circle of unicorn princesses, to help Princess Sunbeam regain her magical powers.

Cressida is thrilled to be the first human to participate in the annual Thunder Games, but angry boulders and an inept wizard-lizard threaten to ruin the competition.

Unicorn Princess Bloom asks the human girl Cressida to help with final preparations for her birthday party, but when they discover quails destroying the party decorations and realize that the invitation to Princess Bloom's best friend has gone astray, they fear the celebration will be ruined.

Cressida visits the Rainbow Realm where Feather, a unicorn who can fly, is having a sleepover, complete with magic pajamas created by Ernest the wizard lizard that will allow the others to fly.

After finding a magical feather in the woods, Clara Griffin is transported to the Winged Realm where she meets eight pegasus princesses and helps Princess Mist build a cloud maze.

Collects three stories about Cressida and her discovery of a unicorn and her visits to the Rainbow Realm where she meets the other Unicorn Princesses.

Ernest the wizard lizard's spell allows Princess Flash to join Princess Feather and Cressida on a trip to the Wing Realm but when the spell goes wrong, Cressida must find a way to get them home.

Moon's dance: Cressida eagerly accepts Princess Moon's invitation to attend the annual Starlight Ball, but when Ernest the wizard-lizard causes the ballroom to disappear, the unicorn princesses must magically prepare another space. Prism's paint: After one of Ernest the wizard-lizard's spells goes awry, draining color from Princess Prism and her domain, the unicorn princesses call on the human girl Cressida to help Prism locate the Valley of Light's...