Excited to receive a pet unicorn on her eighth birthday, Princess Bella worries because her friends are fighting and her parents seem to be hiding something, which Bella fears might mean that she won't get the unicorn of her dreams.
Princess Bella prepares to show off her new unicorn, Glimmer, to the people of the Crystal Kingdom, but when Glimmer disappears before Bella can go for her first ride, she and her friends must search the entire kingdom, even the Dark Forest.
Anticipating a visit from her favorite cousin, Princess Bella experiences jealousy when Ivy, Clara, and the unicorn Glimmer instantly fall in love with her guest.
When Princess Bella throws a farewell party for her cousin, her evil aunt shows up and demands that Bella find a magic crystal hidden in the castle or lose Glimmer forever.
